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           Section 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION





PRODUCT NAME

        SODIUM DIACETATE



SYNONYMS

       C4-H7-Na-O4, CH3COONa.CH3COOH, "acetic acid, sodium salt, compd. with acetic

       acid (1:1)", "sodium hydrogen diacetate", "acetic acid, sodium salt (2:1)",

       "sodium acid acetate", Dykon



PRODUCT USE

        Buffer; an inhibitor of moulds and rope-forming bacteria in bread; souring

        agent; intermediate for acid salts, mordants, varnish hardeners, antitarnishing

        agents, sequestrant and preservative in foods.



SUPPLIER

Quantum Chemicals Pty Ltd

70 Quantum Close

Quantum Industrial Park

Dandenong South VIC 3175

Australia

Telephone: 1300 782 688

Emergency Tel: 1300 131 001

Fax: 1300 782 699





HAZARD RATINGS





      Flammability

          Toxicity

     Body Contact

         Reactivity

          Chronic



           SCALE:      Min/Nil=0       Low=1       Moderate=2       High=3       Extreme=4





           Section 2 - HAZARDS IDENTIFICATION





STATEMENT OF HAZARDOUS NATURE

        HAZARDOUS SUBSTANCE. NON-DANGEROUS GOODS. According to the

        Criteria of NOHSC, and the ADG Code.

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Chemwatch Material Safety Data Sheet (REVIEW)

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                                                                            Section 2 - HAZARDS IDENTIFICATION









POISONS SCHEDULE

         S5



RISK

           Causes burns.

           Risk of serious damage to eyes.



SAFETY

           Do not breathe dust.

           Wear eye/face protection.

           Take off immediately all contaminated clothing.

           In case of contact with eyes, rinse with plenty of water and contact Doctor or

             Poisons Information Centre.





           Section 3 - COMPOSITION / INFORMATION ON INGREDIENTS



NAME                                                                                        CAS RN      %

sodium diacetate                                                                            126-96-5    > 99

NOTE: On contact with water decomposes to produce

acetic acid glacial                                                                         64-19-7





           Section 4 - FIRST AID MEASURES





SWALLOWED

       If poisoning occurs, contact a doctor or Poisons Information Centre.

       � If swallowed do NOT induce vomiting.

       � If vomiting occurs, lean patient forward or place on left side (head-down

       position, if possible) to maintain open airway and prevent aspiration.

       � Observe the patient carefully.

       � Never give liquid to a person showing signs of being sleepy or with reduced

       awareness; i.e. becoming unconscious

       � Give water to rinse out mouth, then provide liquid slowly and as much as

       casualty can comfortably drink.

       � Seek medical advice.



EYE

           If this product comes in contact with the eyes:

           � Immediately hold eyelids apart and flush the eye continuously with running

           water.

           � Ensure complete irrigation of the eye by keeping eyelids apart and away from

           eye and moving the eyelids by occasionally lifting the upper and lower lids.

           � Continue flushing until advised to stop by the Poisons Information Centre or a

           doctor, or for at least 15 minutes.

           � Transport to hospital or doctor without delay.

           � Removal of contact lenses after an eye injury should only be undertaken by

           skilled personnel.



SKIN

           If skin contact occurs:

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Chemwatch Material Safety Data Sheet (REVIEW)

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                                                                                      Section 4 - FIRST AID MEASURES



           � Immediately remove all contaminated clothing, including footwear

           � Flush skin and hair with running water (and soap if available).

           � Seek medical attention in event of irritation.



INHALED

           � If fumes or combustion products are inhaled remove from contaminated area.

           � Lay patient down. Keep warm and rested.

           � Prostheses such as false teeth, which may block airway, should be removed,

           where possible, prior to initiating first aid procedures.

           � Apply artificial respiration if not breathing, preferably with a demand valve

           resuscitator, bag-valve mask device, or pocket mask as trained. Perform CPR if

           necessary.

           � Transport to hospital, or doctor.



NOTES TO PHYSICIAN

         For acute or short term repeated exposures to strong acids:

         � Airway problems may arise from laryngeal edema and inhalation exposure. Treat

         with 100% oxygen initially.

         � Respiratory distress may require cricothyroidotomy if endotracheal intubation

         is contraindicated by excessive swelling

         � Intravenous lines should be established immediately in all cases where there

         is evidence of circulatory compromise.

         � Strong acids produce a coagulation necrosis characterised by formation of a

         coagulum (eschar) as a result of the dessicating action of the acid on proteins

         in specific tissues.



           INGESTION:

           � Immediate dilution (milk or water) within 30 minutes post ingestion is

           recommended.

           � DO NOT attempt to neutralise the acid since exothermic reaction may extend the

           corrosive injury.

           � Be careful to avoid further vomit since re-exposure of the mucosa to the acid

           is harmful. Limit fluids to one or two glasses in an adult.

           � Charcoal has no place in acid management.

           � Some authors suggest the use of lavage within 1 hour of ingestion.

           SKIN:

           � Skin lesions require copious saline irrigation. Treat chemical burns as

           thermal burns with non-adherent gauze and wrapping.

           � Deep second-degree burns may benefit from topical silver sulfadiazine.

           EYE:

           � Eye injuries require retraction of the eyelids to ensure thorough irrigation

           of the conjuctival cul-de-sacs. Irrigation should last at least 20-30 minutes.

           DO NOT use neutralising agents or any other additives. Several litres of saline

           are required.

           � Cycloplegic drops, (1% cyclopentolate for short-term use or 5% homatropine for

           longer term use) antibiotic drops, vasoconstrictive agents or artificial tears

           may be indicated dependent on the severity of the injury.

           � Steroid eye drops should only be administered with the approval of a

           consulting ophthalmologist).

           [Ellenhorn and Barceloux: Medical Toxicology].





           Section 5 - FIRE FIGHTING MEASURES





EXTINGUISHING MEDIA

� Water spray or fog.

� Foam.

� Dry chemical powder.

� BCF (where regulations permit).

� Carbon dioxide.

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                                                                                Section 5 - FIRE FIGHTING MEASURES



FIRE FIGHTING

� Alert Fire Brigade and tell them location and nature of hazard.

� Wear full body protective clothing with breathing apparatus.

� Prevent, by any means available, spillage from entering drains or water

course.

� Use water delivered as a fine spray to control fire and cool adjacent area.

� Avoid spraying water onto liquid pools.

� DO NOT approach containers suspected to be hot.

� Cool fire exposed containers with water spray from a protected location.

� If safe to do so, remove containers from path of fire.



FIRE/EXPLOSION HAZARD

� Combustible.

� Slight fire hazard when exposed to heat or flame.

� Heating may cause expansion or decomposition leading to violent rupture of

containers.

� On combustion, may emit toxic fumes of carbon monoxide (CO).

� May emit acrid smoke.

� Mists containing combustible materials may be explosive.

Other combustion products include carbon dioxide (CO2).

May emit corrosive fumes.

Avoid creating dust - may present dust explosion hazard. Dry dust can be

electrostatically charged by turbulence, pneumatic transport, pouring, in

exhaust ducts and during transport. Build-up of electrostatic charge may be

prevented by grounding.



FIRE INCOMPATIBILITY

Avoid contamination with oxidising agents i.e. nitrates, oxidising acids,

chlorine bleaches, pool chlorine etc. as ignition may result.



HAZCHEM

              None





              Section 6 - ACCIDENTAL RELEASE MEASURES





EMERGENCY PROCEDURES



      MINOR SPILLS

          � Remove all ignition sources.

          � Clean up all spills immediately.

          � Avoid contact with skin and eyes.

          � Control personal contact by using protective equipment.

          � Use dry clean up procedures and avoid generating dust.

          � Place in a suitable labelled container for waste disposal.



      MAJOR SPILLS

          Moderate hazard.

          � Clear area of personnel and move upwind.

          � Alert Fire Brigade and tell them location and nature of hazard.

          � Wear breathing apparatus plus protective gloves.

          � Prevent, by any means available, spillage from entering drains or water

          course.

          � No smoking, naked lights or ignition sources.

          � Increase ventilation.

          � Stop leak if safe to do so.

          � Contain spill with sand, earth or vermiculite.

          � Collect recoverable product into labelled containers for recycling.

          � Absorb remaining product with sand, earth or vermiculite.

          � Collect solid residues and seal in labelled drums for disposal.

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                                                                  Section 6 - ACCIDENTAL RELEASE MEASURES



           � Wash area and prevent runoff into drains.

           � After clean up operations, decontaminate and launder all protective clothing

           and equipment before storing and re-using.

           � If contamination of drains or waterways occurs, advise emergency services.



SAFE STORAGE WITH OTHER CLASSIFIED CHEMICALS

___________________________________________







  +     +      +       +      +       +

___________________________________________

+: May be stored together

O: May be stored together with specific preventions

X: Must not be stored together





           Personal Protective Equipment advice is contained in Section 8 of the MSDS.





           Section 7 - HANDLING AND STORAGE





PROCEDURE FOR HANDLING

       � Avoid all personal contact, including inhalation.

       � Wear protective clothing when risk of exposure occurs.

       � Use in a well-ventilated area.

       � Prevent concentration in hollows and sumps.

       � DO NOT enter confined spaces until atmosphere has been checked.

       � Avoid smoking, naked lights or ignition sources.

       � Avoid contact with incompatible materials.

       � When handling, DO NOT eat, drink or smoke.

       � Keep containers securely sealed when not in use.

       � Avoid physical damage to containers.

       � Always wash hands with soap and water after handling.

       � Work clothes should be laundered separately.

       � Use good occupational work practice.

       � Observe manufacturer's storing and handling recommendations.

       � Atmosphere should be regularly checked against established exposure standards

       to ensure safe working conditions.



SUITABLE CONTAINER

         Glass container.

         Multi-ply woven plastic or paper bag with sealed plastic liner

         NOTE: Bags should be stacked, blocked, interlocked, and limited in height so

         that they are stable and secure against sliding or collapse.

         � Polyethylene or polypropylene container.

         � Packing as recommended by manufacturer

         � Check all containers are clearly labelled and free from leaks.



STORAGE INCOMPATIBILITY

        Avoid reaction with oxidising agents.



STORAGE REQUIREMENTS

        � Store in original containers.

        � Keep containers securely sealed.

        � No smoking, naked lights or ignition sources.

        � Store in a cool, dry, well-ventilated area.

        � Store away from incompatible materials and foodstuff containers.

        � Protect containers against physical damage and check regularly for leaks.

        � Observe manufacturer's storing and handling recommendations.

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             Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION





EXPOSURE CONTROLS

Source                           Material               TWA       TWA       STEL    STEL      Peak     Peak

                                                        ppm       mg/m³     ppm     m5/m³     ppm      mg/m³

_________________________        ________________       _____     _____     _____   _____     _____    _____

Australia Exposure               sodium diacetate                 10

Standards

Australia Exposure               acetic acid            10        25        15      37

Standards                        glacial



The following materials had no OELs on our record under the following CAS or Chemwatch (CW) numbers

sodium diacetate: No data available for CAS:126-96-5





      EMERGENCY EXPOSURE LIMITS

Material            Original IDLH              Original IDLH       Revised IDLH Value       Revised IDLH Value

                    Value (ppm)                Value (mg/m3)       (mg/m3)                  (ppm)

acetic acid glacial 1,000                                                                   50



These "dusts" have little adverse effect on the lungs and do not produce toxic

effects or organic disease. Although there is no dust which does not evoke some

cellular response at sufficiently high concentrations, the cellular response

caused by P.N.O.C.s has the following characteristics:

� the architecture of the air spaces remain intact,

� scar tissue (collagen) is not synthesised to any degree,

� tissue reaction is potentially reversible.

Extensive concentrations of P.N.O.C.s may:

� seriously reduce visibility,

� cause unpleasant deposits in the eyes, ears and nasal passages,

� contribute to skin or mucous membrane injury by chemical or mechanical action,

per se, or by the rigorous skin cleansing procedures necessary for their

removal. [ACGIH]

This limit does not apply:

� to brief exposures to higher concentrations

� nor does it apply to those substances that may cause physiological impairment

at lower concentrations but for which a TLV has as yet to be determined.

This exposure standard applies to particles which

� are insoluble or poorly soluble* in water or, preferably, in aqueous lung

fluid (if data is available) and

� have a low toxicity (i.e.. are not cytotoxic, genotoxic, or otherwise

chemically reactive with lung tissue, and do not emit ionizing radiation, cause

immune sensitization, or cause toxic effects other than by inflammation or by a

mechanism of lung overload).



      ODOUR SAFETY FACTOR (OSF)

     OSF=21 ("ACETIC ACID, GLACIAL")

     Exposed individuals are NOT reasonably expected to be warned, by smell, that the

     Exposure Standard is being exceeded.

     Odour Safety Factor (OSF) is determined to fall into either Class C, D or E.

     The Odour Safety Factor (OSF) is defined as:

     OSF= Exposure Standard (TWA) ppm/ Odour Threshold Value (OTV) ppm

     Classification into classes follows:



     Class      OSF         Description

     A          550         Over 90% of exposed

                            individuals are aware by

                            smell that the Exposure

                            Standard (TLV-TWA for

                            example) is being

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                                            Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION



                               "reached " even when

                               distracted by working

                               activities

    B             26-550       As """A""" for 50-90% of

                               persons being distracted

    C             1-26         As """A""" for less than

                               50% of persons being

                               distracted

    D             0.18-1       10-50% of persons aware

                               of being tested perceive

                               by smell that the

                               Exposure Standard is

                               being reached

    E             <0.18        As """D""" for less than

                               10% of persons aware of

                               being tested



    .



    INGREDIENT DATA

ACETIC ACID GLACIAL:

  Odour Threshold Value: 0.037-0.15 ppm (detection)

  NOTE:Detector tubes for acetic acid, measuring in excess of 1 ppm, are

  commercially available.

  Exposure at or below the TLV-TWA and TLV-STEL is thought to protect the

  worker against conjunctival, nose and respiratory tract irritation.



PERSONAL PROTECTION









        EYE

              � Safety glasses with side shields; or as required,

              � Chemical goggles.

              � Contact lenses may pose a special hazard; soft contact lenses may absorb and

              concentrate irritants. A written policy document, describing the wearing of lens

              or restrictions on use, should be created for each workplace or task. This

              should include a review of lens absorption and adsorption for the class of

              chemicals in use and an account of injury experience. Medical and first-aid

              personnel should be trained in their removal and suitable equipment should be

              readily available. In the event of chemical exposure, begin eye irrigation

              immediately and remove contact lens as soon as practicable. Lens should be

              removed at the first signs of eye redness or irritation - lens should be removed

              in a clean environment only after workers have washed hands thoroughly. [CDC

              NIOSH Current Intelligence Bulletin 59].



        HANDS/FEET

            Rubber gloves. Safety footwear.



        OTHER

            � Overalls.

            � Eyewash unit.



        RESPIRATOR

            Protection Factor           Half-Face           Full-Face         Powered Air

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                                            Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION



                                      Respirator          Respirator        Respirator

           10 x ES                    P1 Air-line*        --                PAPR-P1 -

           50 x ES                    Air-line**          P2                PAPR-P2

           100 x ES                   -                   P3                -

                                                          Air-line*         -

           100+ x ES                  -                   Air-line**        PAPR-P3



           * - Negative pressure demand ** - Continuous flow.



           The local concentration of material, quantity and

           conditions of use determine the type of personal

           protective equipment required.

           For further information consult site specific

           CHEMWATCH data (if available), or your

           Occupational Health and Safety Advisor.



ENGINEERING CONTROLS

        � Local exhaust ventilation is required where solids are handled as powders or

        crystals; even when particulates are relatively large, a certain proportion will

        be powdered by mutual friction.

        � Exhaust ventilation should be designed to prevent accumulation and

        recirculation of particulates in the workplace.

        � If in spite of local exhaust an adverse concentration of the substance in air

        could occur, respiratory protection should be considered. Such protection might

        consist of:

        (a): particle dust respirators, if necessary, combined with an absorption

        cartridge;

        (b): filter respirators with absorption cartridge or canister of the right type;

        (c): fresh-air hoods or masks

        � Build-up of electrostatic charge on the dust particle, may be prevented by

        bonding and grounding.

        � Powder handling equipment such as dust collectors, dryers and mills may

        require additional protection measures such as explosion venting.



           Air contaminants generated in the workplace possess varying "escape" velocities

           which, in turn, determine the "capture velocities" of fresh circulating air

           required to efficiently remove the contaminant.



           Type of Contaminant:                                  Air Speed:

           direct "spray " spray painting in                     1-2.5 m/s (200-500 f/min.)

           shallow "booths " drum "filling "

           conveyer "loading " crusher "dusts "

           gas discharge (active generation into

           zone of rapid air motion)

           grinding " abrasive "blasting "                       2.5-10 m/s (500-2000 f/min.)

           "tumbling " high speed wheel generated

           dusts (released at high initial

           velocity into zone of very high rapid

           air motion).



           Within each range the appropriate value depends on:



           Lower end of the range                               Upper end of the range

           1: Room air currents minimal or                      1: Disturbing room air currents

           favourable to capture

           2: Contaminants of low toxicity or of                2: Contaminants of high toxicity

           nuisance value only

           3: Intermittent, low production.                     3: High production, heavy use

           4: Large hood or large air mass in                   4: Small hood-local control only

           motion

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                                            Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION



           Simple theory shows that air velocity falls rapidly with distance away from the

           opening of a simple extraction pipe. Velocity generally decreases with the

           square of distance from the extraction point (in simple cases). Therefore the

           air speed at the extraction point should be adjusted, accordingly, after

           reference to distance from the contaminating source. The air velocity at the

           extraction fan, for example, should be a minimum of 4-10 m/s (800-2000 f/min)

           for extraction of crusher dusts generated 2 metres distant from the extraction

           point. Other mechanical considerations, producing performance deficits within

           the extraction apparatus, make it essential that theoretical air velocities are

           multiplied by factors of 10 or more when extraction systems are installed or

           used.





           Section 9 - PHYSICAL AND CHEMICAL PROPERTIES





APPEARANCE

        White crystalline powder with vinegar odour; soluble in water,

        liberating 42.25% available acetic acid.             Slightly soluble in alcohol;

        insoluble in ether.



PHYSICAL PROPERTIES

Solid.

Mixes with water.

Acid.



Molecular Weight: 142.09                                Boiling Range (°C): Decomposes.

Melting Range (°C): Decomposes.                         Specific Gravity (water=1): Not available.

Solubility in water (g/L): Miscible                     pH (as supplied): Not applicable

pH (1% solution): 4.5-5.0 (10%).                        Vapour Pressure (kPa): Not available.

Volatile Component (%vol): Not available.               Evaporation Rate: Not available

Relative Vapour Density (air=1): 4.9                    Flash Point (°C): Not applicable

Lower Explosive Limit (%): Not available.               Upper Explosive Limit (%): Not available.

Autoignition Temp (°C): Not available.                  Decomposition Temp (°C): >150

State: Divided solid





           Section 10 - CHEMICAL STABILITY AND REACTIVITY INFORMATION





CONDITIONS CONTRIBUTING TO INSTABILITY

         � Presence of incompatible materials.

         � Product is considered stable.

         � Hazardous polymerisation will not occur.





           Section 11 - TOXICOLOGICAL INFORMATION





POTENTIAL HEALTH EFFECTS



ACUTE HEALTH EFFECTS



     SWALLOWED

         The solid/dust is corrosive to the gastro-intestinal tract and may cause severe

         mucous membrane damage.

         Considered an unlikely route of entry in commercial/industrial environments.



     EYE

           The dust may be extremely discomforting to the eyes and is capable of causing

           pain and severe conjunctivitis. Corneal injury may develop, with possible

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                                                                     Section 11 - TOXICOLOGICAL INFORMATION



            permanent impairment of vision, if not promptly and adequately treated.

            The material may produce moderate eye irritation leading to inflammation.

            Repeated or prolonged exposure to irritants may produce conjunctivitis.



     SKIN

            The material may be moderately discomforting to the skin and is capable of

            causing burns.

            The material may cause skin irritation after prolonged or repeated exposure and

            may produce on contact skin redness, swelling, the production of vesicles,

            scaling and thickening of the skin.



     INHALED

         The dust may be highly discomforting to the upper respiratory tract.

         Persons with impaired respiratory function, airway diseases and conditions such

         as emphysema or chronic bronchitis, may incur further disability if excessive

         concentrations of particulate are inhaled.

         The material may produce respiratory tract irritation, and result in damage to

         the lung including reduced lung function.



     CHRONIC HEALTH EFFECTS

         Principal routes of exposure are by accidental skin and eye contact and

         inhalation of generated dusts. No human exposure data available. For this reason

         health effects described are based on experience with chemically related

         materials. As with any chemical product, contact with unprotected bare skin;

         inhalation of vapour, mist or dust in work place atmosphere; or ingestion in any

         form, should be avoided by observing good occupational work practice.



TOXICITY AND IRRITATION

Not available. Refer to individual constituents.

unless otherwise specified data extracted from RTECS - Register of Toxic Effects

of Chemical Substances



ACETIC ACID GLACIAL:

TOXICITY                                                         IRRITATION

Oral (human) TDLo: 1.47 mg/kg                                    Skin (human):50mg/24hr - Mild

Unreport (man) LDLo: 308 mg/kg                                   Skin (rabbit):525mg (open)-SEVERE

Oral (rat) LD50: 3310 mg/kg                                      Eye (rabbit): 0.05mg (open)-SEVERE

Inhalation (human) TCLo: 816 ppm/3 min

Inhalation (rat) LCLo: 16000 ppm/4 hr

Dermal (rabbit) LD50: 1060 mg/kg





            Section 12 - ECOLOGICAL INFORMATION



            No data for sodium diacetate.

            Refer to data for ingredients, which follows:



            ACETIC ACID GLACIAL:

            "Fish LC50 (96hr.) (mg/l):" 88,92

            "Daphnia magna EC50 (48hr.) (mg/l):" 32

            "Algae IC50 (72hr.) (mg/l):" 90

            "log Kow (Prager 1995):" -0.31

            "log Kow (Sangster 1997):" -0.17

            "log Pow (Verschueren 1983):" 1.8E+0



            log Kow: -0.3- -O.17

            Half-life (hr) air: 641

            Henry's atm m³ /mol: 1.00E-09

            BOD 5 if unstated: 0.34-0.88,36%

            BCF: <1

            Toxicity Fish: LC50 (96h) 75-88 mg/l

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                                                                        Section 12 - ECOLOGICAL INFORMATION



          Toxicity invertebrate: cell mult. inhib. 78-4000mg/L

          Bioaccumulation: not sig

          Degradation Biological: readily degrad

          processes Abiotic: Rxn OH*,hydrol

          Acetic acid is degraded photochemically in the atmosphere to produce

          hydroxyl radicals (estimated typical half-life of 22 days).

          Physical removal of acetates on atmospheric particulates may occur via

          wet or dry deposition.

          Natural water will neutralise dilute solutions of acetic acid.

          Spills of acetic acid on soil will readily biodegrade.

          Acetic acid is not expected to bioconcentrate in the aquatic system.

          Low concentrations of acetic acid are harmful to fish.

          Drinking water standards: none available.

          Soil Guidelines: none available.

          Air Quality Standards: none available.





          Section 13 - DISPOSAL CONSIDERATIONS



          � Consult manufacturer for recycling options and recycle where possible .

          � Consult State Land Waste Management Authority for disposal.

          � Incinerate residue at an approved site.

          � Recycle containers if possible, or dispose of in an authorised landfill.





          Section 14 - TRANSPORTATION INFORMATION





HAZCHEM

          None





          NOT REGULATED FOR TRANSPORT OF DANGEROUS GOODS:UN,IATA,IMDG





          Section 15 - REGULATORY INFORMATION





POISONS SCHEDULE

         S5



REGULATIONS



          sodium diacetate (CAS: 126-96-5) is found on the following regulatory lists;

          Australia Inventory of Chemical Substances (AICS)

          Australia Poisons Schedule





          Section 16 - OTHER INFORMATION





          This document is copyright. Apart from any fair dealing for the purposes of

          private study, research, review or criticism, as permitted under the Copyright

          Act, no part may be reproduced by any process without written permission from

          CHEMWATCH. TEL (+61 3) 9572 4700.



          Issue Date: 28-Dec-2004

          Print Date: 3-Jul-2006