Material Safety Data Sheet

Revision Issued: 4/08/2002         Supercedes: 7/19/95        First Issued: 12/01/85

             Section I - Chemical Product And Company Identification



                                Product Name: Hi-Sol

         CAS Number: 7647-01-0                     HBCC MSDS No. CH05100









1675 No. Main Street, Orange, California 92867

Telephone No: 714-998-8800 | Outside Calif: 800-821-7234 | Chemtrec: 800-424-9300



                Section II - Composition/Information On Ingredients



                                                     Exposure Limits (TWAs) in Air

Chemical Name                CAS Number      %   ACGIH TLV         OSHA PEL       STEL

Hydrochloric Acid            7647-01-0       98 5 ppm              5 ppm          N/A

N,N' - Diethylthiourea       105-55-5        0.6 N/A               N/A            N/A



                          Section III - Hazard Identification



Summary of Acute Health Hazards

Ingestion: May cause severe burns of the mouth, throat and stomach.

Inhalation: Vapors have an irritating effect on the respiratory tract causing coughing,

burning of the throat, choking sensation, bronchitis, and pulmonary edema.

Skin: May produce irritation and burns of the skin and mucous membranes, the severity

being determined by concentration and duration of exposure.

Eyes: Contact with the eyes may cause severe burns. Unless removed quickly by

thorough irrigation with water, prolonged or permanent visual impairment or loss of sight

may result.

Summary of Chronic Health Hazards: Repeated skin contact may cause dermatitus.

Inhalation effects usually are limited to ulceration and inflammation of the nose, throat

and larynx.

Summary of Toxic Effects: N/A









Hi-Sol                                                                                   1

                             Section IV - First Aid Measures



Ingestion: If person is conscious, immediately administer large quantities of water. Do

Not Induce Vomiting. GET IMMEDIATE MEDICAL ATTENTION.

Inhalation: Move the exposed person to fresh air at once, and if necessary, administer

oxygen. If breathing has stopped, perform artificial respiration. Keep the affected person

warm and at rest. GET PROMPT MEDICAL ATTENTION.

Skin: Immediately flush contaminated skin with water and wash with soap and water. If

large areas of the body are contaminated or if clothing is penetrated, immediately use a

safety shower, preferably removing clothing while under the shower. Flush exposed areas

with large amounts of water for at least 15 minutes. GET PROMPT MEDICAL

ATTENTION. Wash clothing before reuse.

Eyes: Immediately flush eyes with a directed stream of water for at least 15 minutes.

Forcibly hold eyelids apart to ensure complete irrigation of all eyelid tissue. GET

IMMEDIATE MEDICAL ATTENTION.

Medical Conditions Generally Aggravated by Exposure: Hydrochloric acid is a

respiratory irritant. Persons with impaired pulmonary function may be at increased risk

from exposure. Periodic surveillance is indicated.

Note to Physicians: N/A



                           Section V - Fire Fighting Measures

Flash Point: N/A                           Autoignition Temperature: N/A

Lower Explosive Limit: N/A                 Upper Explosive Limit: N/A

Unusual Fire and Explosion Hazards: Reacts with active metals (potassium, sodium,

calcium, powdered aluminum,zinc, magnesium) to produce flammable hydrogen gas.

Extinguishing Media: Use fog, foam, dry chemicals, CO2, or other agents as appropriate

for surrounding fire.

Special Firefighting Procedures: Use self-contained breathing apparatus and full

protective equipment.

                       Section VI - Accidental Release Measures



Evacuate the spill area. Ventilate the area, and avoid breathing the vapors. Wear a

MSHA/NIOSH-approved respirator suitable for the situation. Dike and contain the spill

with inert material (e.g. sand, earth). Small spills may be neutralized with soda ash or

dilute caustic soda. Transfer liquid to containers for recovery or disposal and solid diking

material to seperate containers for disposal. If possible, clean up the spill area on a dry

basis and then flush with plenty of water.



                          Section VII - Handling and Storage









Hi-Sol                                                                                     2

Store in a cool, dry, well-ventilated area away from heat and oxidizing agents. Use acid

service designed equipment for handling and storage.



Other Precautions: N/A



                Section VIII - Exposure Controls/Personal Protection



Respiratory Protection: Use a MSHA/NIOSH-approved organic vapor-acid gas

respirator for areas where airborne exposure is excessive.

Ventilation: Provide good general room ventilation to minimize exposure. Use local

exhaust ventilation at points of vapor emission. System should be discharged into

absorption media.

Protective Clothing: Impermeable gloves, aprons and rubber shoes are advised when

working with this product.

Eye Protection: Wear safety glasses with side shields or chemical goggles. Persons

subject to hydrochloric acid exposure should not wear contact lenses.

Other Protective Clothing or Equipment: An eye wash and safety shower should be in

close proximity.

Work/Hygienic Practices: Wash hands thoroughly with soap and water before eating,

drinking, smoking or using toilet facilities. Do NOT place food, coffee or other drinks in

the area where dusting or splashing of solutions is possible.



                    Section IX - Physical and Chemical Properties

Physical State: Liquid                         pH: 1.0

Melting Point/Range: -74oC; 101.2oF            Boiling Point/Range: 183oF

Appearance/Color/Odor: Clear, odorless to slightly yellow liquid with a sharp, pungent,

irritating odor.

                                               Vapor Pressure(mmHg): 20@20oC

Solubility in Water: 45%

Specific Gravity(Water=1): 1.16-1.19           Molecular Weight: N/A

Vapor Density(Air=1): 1.3                      % Volatiles (by volume): 100

How to detect this compound : N/A

                          Section X - Stability and Reactivity

Stability: Stable          Hazardous Polymerization: Will not occur

Conditions to Avoid: Heat or fire, runoff to sewer, inhalation of gas, sparks where

hydrogen may be present.

Materials to Avoid: Contact with metals and strong oxidizers. Reacts exothermically

with alkalies, metal oxides, amines, active metals carbonates, and sulfides. Reacts with

oxidizers to give chlorine gas. Reacts with cyanides to give hydrogen cyanide gas. Reacts

with sulfides to give hydrogen sulfide gas. Reacts with formaldehyde to give

bischloromethyl ether (an OSHA regulated carcinogen). Reacts with amines to form







Hi-Sol                                                                                     3

ammonia. Reacts with carbonates to form carbon dioxide. Other materials to avoid are:

Bases, acetic anhydride, alkali metals, aluminum, copper, copper alloys, fluorine, iron,

sodium hydroxide, steel, sulfuric acid, vinyl acetate, zinc, potassium permanganate,

cesium acetylene carbide, rubidium acetylene carbide, rubidium carbide, sodium,

chlorosulfonic acid, oleum carbonates, perchloric acid, calcium phosphide, metal oxides,

acetates, cesium carbide, beta-propiolactone, ethyleneimine, propylene oxide, lithium

silicides, alcohols + hydrogen cyanide, 2-aminoethanol, ammonium hydroxide, calcium

carbide, 1,1-difluoroethylene, ethylene diamine, magnesium boride, mercuric sulfate,

silver perchlorate + carbon tetrachloride, uranium phosphide.

Hazardous Decomposition Products: Flammable hydrogen gas can be produced by the

reaction with most metals. Chlorine will be released by mixing with strong oxidizers.

Hydrogen chloride, carbon monoxide, carbon dioxide.

                        Section XI - Toxicological Information



Toxicology Testing Data: (Hydrochloric Acid):

Acute Inhalation Toxicity: LC50 (Rat, 1Hour) - 3124 ppm

Corrosivity (Rabbit): 0.01 - 15% Concentration - Noncorrosive; > 15% Concentration -

Corrosive

Acute Oral Toxicity: LD50 (Rabbit) - 900mg/Kg.



Toxicology Testing Data: (Diethylthiorea):

Acute Dermal Toxicity: 2000 mg/kg (Rabbit), 24 hour contact: Animals remained

asymptomatic

Acute Oral Toxicity: LD50 (Rat) - 316 mg/kg LD50 (Mus) - 681 mg/kg



                          Section XII - Ecological Information



Rapidly hydrolyzes when exposed to water. Will exhibit extensive evaporation from soil

surfaces. Upon transport through the soil, hydrochloric acid will dissolve some of the soil

materials (especially those with carbonate bases) and the acid will neutralize to some

degree.



                        Section XIII - Disposal Considerations



Dispose of in accordance with applicable local, county, state and federal regulations.



                         Section XIV - Transport Information



DOT Proper Shipping Name: Hydrochloric Acid

DOT Hazard Class/ I.D. No.: 8,UN1789, II









Hi-Sol                                                                                     4

                         Section XV - Regulatory Information



Reportable Quantity:

NFPA Rating: Health - 3; Fire - 0; Reactivity - 0

0=Insignificant 1=Slight 2=Moderate 3=High 4=Extreme



Carcinogenicity Lists: No NTP: No IARC Monograph: No OSHA Regulated: No

NOTE: The National Cancer Institute (NCI) has reported that N,N' - Diethylthiourea

causes cancer in animals under the conditions of the NCI bioassay test. The results

indicate a potential risk to man. Human exposure to N,N' - Diethylthiourea should be

minimized.



Section 313 Supplier Notification: This product contains the following toxic

chemcial(s) subject to the reporting requirements of SARA TITLE III Section 313 of the

Emergency Planning and Community Right-To Know Act of 1986 and of 40 CFR 372:

      CAS #                     Chemical Name                         % By Weight

     7647-01-0                  Hydrochloric Acid                        98%

                            Section XVI - Other Information



Synonyms/Common Names: Inhibited Muriatic Acid, Hydrochloric Acid, Hydrogen

Chloride Solution, HCL

Chemical Family/Type: Inorganic Acid Solution

Sections changed since last revision: III - IX, XII, XIV



IMPORTANT! Read this MSDS before use or disposal of this product. Pass along the

information to employees and any other persons who could be exposed to the product to

be sure that they are aware of the information before use or other exposure. This MSDS

has been prepared according to the OSHA Hazard Communication Standard [29 CFR

1910.1200]. The MSDS information is based on sources believed to be reliable.

However, since data, safety standards, and government regulations are subject to change

and the conditions of handling and use, or misuse are beyond our control, Hill Brothers

Chemical Company makes no warranty, either expressed or implied, with respect to the

completeness or continuing accuracy of the information contained herein and disclaims

all liability for reliance thereon. Also, additional information may be necessary or helpful

for specific conditions and circumstances of use. It is the user's responsibility to

determine the suitability of this product and to evaluate risks prior to use, and then to

exercise appropriate precautions for protection of employees and others.









Hi-Sol                                                                                     5