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MSDS Material Safety Data Sheet
CAS

10124-53-5
7732-18-5

File Name: tkinet_com---magnesium-thiosulfate.asp
                                                                     Material Safety Data Sheet

MagThio鈩?
MSDS Number 5500 (Revised: 11/30/04) 6 Pages
Section 1: CHEMICAL PRODUCT and COMPANY IDENTIFICATION


鈩?
1.1 Product Name ....................................... MagThio
Chemical Family ..................................... Inorganic salt solution
Synonyms ............................................... Magnesium thiosulfate, Thiosulfuric acid (H2S2O3),
magnesium salt, magnesium hyposulfite
Formula ................................................... MgS2O3

1.2 Manufacturer ......................................... Tessenderlo Kerley Inc.
th
2255 N. 44 Street, Suite 300
Phoenix, Arizona 85008-3279
Ifr t n.............鈥?..6 2 8 9
nomai ............. . (0 ) 8 -8300
o ............. .

1.3 Emergency Contact ...................... (800) 877-1737 (Tessenderlo Kerley)
(800) 424-9300 (CHEMTREC)


Section 2: COMPOSITION, INFORMATION ON INGREDIENTS


2.1 Chemical Ingredients (% by wt.)

Magnesium thiosulfate CAS #:10124-53-5 20%
Water CAS #:7732-18-5 80%

(See Section 8 for exposure guidelines)


Section 3: HAZARDS IDENTIFICATION


NFPA: Health - 1 Flammability - 0 Reactivity - 0


EMERGENCY OVERVIEW

Contact may cause eye irritation.
Repeated/prolonged skin contact may cause irritation.
Ingestion may irritate gastrointestinal tract.
Heating may cause sulfur dioxide gas to evolve.
Page 2.

Section 3: HAZARDS IDENTIFICATION (Cont.)


3.1 POTENTIAL HEALTH EFFECTS

EYE: Contact with the eyes by product mist or solution may cause irritation or a burning sensation.

SKIN CONTACT: Prolonged or repeated contact with product mist or solution may cause skin irritation.

SKIN ABSORPTION: Absorption is unlikely to occur.

INGESTION: Ingestion of product solution may cause irritation of the gastrointestinal tract to include nausea,
vomiting and diarrhea. Magnesium thiosulfate is considered to have a low toxicity to humans.

INHALATION: Inhalation of product mist may cause irritation of the nose, throat and respiratory tract.

CHRONIC EFFECTS/CARCINOGENICITY: Not listed as a carcinogen by NTP, IARC or OSHA.


Section 4: FIRST AID MEASURES


4.1 EYES: Immediately flush with large quantities of water for 15 minutes. Hold eyelids apart during irrigation
to insure thorough flushing of the entire area of the eye and lids. Obtain medical attention if irritation occurs.

4.2 SKIN: Immediately flush with large quantities of water. Remove contaminated clothing under a safety
shower. Obtain medical attention if irritation occurs.

4.3 INGESTION: If victim is conscious, give 2 to 4 glasses of water and induce vomiting by touching finger to
back of throat. Obtain medical attention.

4.4 INHALATION: Remove victim from contaminated atmosphere. If breathing is labored, administer oxygen.
If breathing has ceased, clear airway and start mouth to mouth resuscitation. If heart has stopped beating,
external heart massage should be applied. Obtain medical attention.


Section 5: FIRE FIGHTING MEASURES


5.1 FLAMMABLE PROPERTIES

FLASH POINT: Not flammable METHOD USED: NA

5.2 FLAMMABLE LIMITS LFL: NA UFL: NA

5.3 EXTINGUISHING MEDIA: As appropriate for combustibles involved in fire.

5.4 FIRE & EXPLOSIVE HAZARDS: Heating to dryness may cause the release of oxides of sulfur.

Keep containers/storage vessels in fire area cooled with water spray. Heating may cause the release of
oxides of sulfur.
Page 3

Section 5: FIRE FIGHTING MEASURES (Cont.)


5.5 FIRE FIGHTING EQUIPMENT: As in any fire, wear self-contained breathing apparatus, positive pressure
type, MSHA/NIOSH (approved or equivalent) and full protective gear.


Section 6: ACCIDENTAL RELEASE MEASURES


6.1 Small releases: Confine and absorb small releases on sand earth or other inert absorbent. Use water
spray to dilute to weak fertilizer solution.

6.2 Large releases: Confine area to qualified personnel. Shut off release if safe to do so. Dike spill area to
prevent runoff into sewers, drains or surface waterways (potential aquatic toxicity). Recover as much of the
solution as possible. Treat remaining material as a small release (above).


Section 7: HANDLING and STORAGE


7.1 Handling: Avoid contact with eyes. Use only in a well ventilated area. Wash thoroughly after handling.
Avoid prolonged or repeated breathing of vapors. Avoid prolonged or repeated contact with the skin.

7.2 Storage: Store in well ventilated areas. Do not store combustibles in the area of storage vessels. Keep
away from any sources of heat or flame. Store tote and smaller containers out of direct sunlight at moderate
temperatures. (See Section 10.4 for materials of construction)


Section 8: EXPOSURE CONTROLS, PERSONAL PROTECTION


8.1 RESPIRATORY PROTECTION: None generally required. If conditions exist where mist may be
generated, a NIOSH/MSHA approved mist respirator should be worn.

8.2 SKIN PROTECTION: Neoprene rubber gloves and apron should be worn to prevent repeated or
prolonged contact with the liquid. Wash contaminated clothing prior to reuse.

8.3 EYE PROTECTION: Chemical goggles and a full face shield.

8.4 EXPOSURE GUIDELINES: OSHA ACGIH
TWA STEL TLV STEL
None NA NA NA NA

8.5 ENGINEERING CONTROLS: Use adequate exhaust ventilation to prevent inhalation of product vapors.


Section 9: PHYSICAL and CHEMICAL PROPERTIES


9.1 APPEARANCE: Colorless to pale yellow liquid.
9.2 ODOR: May have a slight organic odor.
Page 4.

Section 9: PHYSICAL and CHEMICAL PROPERTIES (Cont.)


9.3 BOILING POINT: Not Determined
9.4 VAPOR PRESSURE: Not Determined
9.5 VAPOR DENSITY: Not determined
9.6 SOLUBILITY IN WATER: Complete
9.7 SPECIFIC GRAVITY: 1.25 (10.4 lbs/gal)
9.8 FREEZING POINT: Not Determined
9.9 pH: 5-7
9.10 VOLATILE: Not applicable


Section 10: STABILITY and REACTIVITY


10.1 STABILITY: This is a stable material

10.2 HAZARDOUS POLYMERIZATION: Will not occur

10.3 HAZARDOUS DECOMPOSITION PRODUCTS: Heating this product will evolve oxides of sulfur.
Heating to dryness will cause the production of magnesium oxide and oxides of sulfur. Sulfur dioxide is a
severe respiratory hazard.

10.4 INCOMPATIBILITY: Strong oxidizers such as nitrates, nitrites or chlorates can cause explosive mixtures
if heated to dryness. Acids will cause the release of sulfur dioxide, a severe respiratory hazard. The following
materials of construction are not compatible with magnesium thiosulfate solutions: carbon steel (SEE Section
7.2, Storage)


Section 11: TOXICOLOGICAL INFORMATION


11.1 ORAL: Data not available

11.2 DERMAL: Subcutaneous-Mouse LD50: 103 mg/kg

11.3 INHALATION: Data not available

11.4 CHRONIC/CARCINOGENICITY: No evidence available

11.5 TERATOLOGY: Data not available

11.6 REPRODUCTION: Data not available

11.7 MUTAGENICITY: Data not available


Section 12: ECOLOGICAL INFORMATION

No data available.
Page 5

Section 13: DISPOSAL CONSIDERATIONS


Magnesium thiosulfate is not considered a hazardous waste under Federal Hazardous Waste Regulations, 40
CFR 261. Consult state and local regulations for different or more restrictive disposal regulations.


Section 14: TRANSPORT INFORMATION


14.1 DOT Shipping Name: Magnesium thiosulfate solution

14.2 DOT Hazard Class: NA

14.3 UN/NA Number: NA

14.4 Packing Group: NA

14.5 DOT Placard: NA

14.6 DOT Label(s): NA

14.7 IMO Shipping Name: Magnesium thiosulfate solution

14.8 RQ (Reportable Quantity): NA

14.9 RR STCC Number: Not available


Section 15: REGULATORY INFORMATION


15.1 OSHA: This product is listed as a hazardous material under criteria of the Federal
OSHA Hazard Communication Standard, 29 CFR 1910.1200.

15.2 SARA TITLE III: a. EHS (Extremely Hazardous Substance) List: No

b. Section 311/312, (Tier I,II) Categories: Immediate (acute) Yes
Fire No
Sudden release No
Reactivity No
Delayed (chronic) No

c. Section 313 (Toxic Release Reporting-Form R): No

Chemical NameCAS Number Concentration

d. TPQ (Threshold Planning Quantity): No

15.3 CERCLA/SUPERFUND: RQ (Reportable Quantity) No

15.4 TSCA (Toxic Substance Control Act) Inventory List: Yes
Page 6

Section 15: REGULATORY INFORMATION (Cont.)


15.5 RCRA (Resource Conservation and Recovery Act) Status: NA

15.6 WHMIS (Canada) Hazard Classification: NA

15.7 DOT Hazardous Material: (See Section 14) No

15.8 CAA Hazardous Air Pollutant (HAP) No


Section 16: OTHER INFORMATION


REVISIONS: The entire MSDS was reformatted to comply to ANSI Standard Z400.1-
1993, by Technical Services-Tessenderlo Kerley, Inc.

Address updated, 4/30/99
Section 8.3, Eye Protection revised and revised logo, 4/30/02
Revised Section 10.4 to reflect compatible materials of construction. 6/16/04
Revised logo for product, Section 9.7, SG and 9.9, pH range. 11/30/2004


THE INFORMATION PUBLISHED IN THIS MATERIAL SAFETY DATA SHEET HAS BEEN COMPILED FROM OUR EXPERIENCE
AND OSHA, ANSI, NFPA, DOT, ERG, AND CHRIS. I I T EU E 鈥? R S O SBLT T D T R N T ES IA IIYO
T S H S RS E P N IIIY O E E MIE H UT BLT F
THIS INFORMATION FOR THE ADOPTION OF NECESSARY SAFETY PRECAUTIONS. WE RESERVE THE RIGHT TO REVISE
MATERIAL SAFETY DATA SHEETS PERIODICALLY AS NEW INFORMATION BECOMES AVAILABLE.

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