ISO9001 - 2000 certified
Material Safety Data Sheet
Sodium hydroxide/sodium thiosulfate
Section 1 - Chemical Product and Company Identification
MSDS Name:
Sodium hydroxide/sodium thiosulfate
Catalog Numbers:
Q00642
Synonyms:
Company Identification:
Qorpak
1195 Washington Pike
Bridgeville, PA 15017
Company Phone Number:
(412) 257-3100
Emergency Phone Number:
(800) 424-9300
CHEMTREC Phone Number:
(800) 424-9300
Section 2 - Composition, Information on Ingredients
Percent
CAS# Chemical Name:
7732-18-5 Water balance
1310-73-2 Sodium hydroxide 50
10102-17-7 Sodium thiosulfate 2.5
Section 3 - Hazards Identification
EMERGENCY OVERVIEW
Appearance: Clear
Danger! Corrosive. Causes skin burns. Causes eye burns. Causes digestive tract burns.
Causes respiratory tract burns.
Target Organs: None.
Potential Health Effects
Eye:
Causes severe eye burns.
Skin:
Causes skin burns. May cause deep, penetrating ulcers of the skin.
Material Safety Data Sheet
Sodium hydroxide/sodium thiosulfate
Ingestion:
Causes gastrointestinal tract burns. Causes severe pain, nausea, vomiting, diarrhea, and shock. May cause temporary
loss of hair.
Inhalation:
Irritation may lead to chemical pneumonitis and pulmonary edema. Causes severe irritation of upper respiratory tract
with coughing, burns, breathing difficulty, and possible coma.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. Sodium hydroxide-- bronchial irritation or pneumonia,
gastrointestinal disturbance, conjunctivitis, dermatitis can occur.
Section 4 - First Aid Measures
Eyes:
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids until
chemical is gone. Get medical aid at once. Cover burns with loose sterile non-medicated bandages.
Skin:
Get medical aid at once. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing
contaminated clothing and shoes. Remove contaminated clothing to reduce further exposure. Cover burns with a dry
sterile bandage (secure, not tight).
Ingestion:
Do NOT induce vomiting. Never give anything by mouth to an unconscious person. Get medical aid at once. Give
conscious non-convulsive victim large quantities of water to dilute the alkali. If necessary, irrigate with 1% acetic acid
until alkali is neutralized.
Inhalation:
Move victim to fresh air immediately. Give artificial respiration if necessary. If breathing is difficult, give oxygen. Get
medical aid.
Notes to Physician:
Treat symptomatically and supportively.
Section 5 - Fire Fighting Measures
General Information:
Wear appropriate protective clothing to prevent contact with skin and eyes. Wear a self-contained breathing apparatus
(SCBA) to prevent contact with thermal decomposition products. Use water with caution and in flooding amounts.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam.
Autoignition Temperature:
Not applicable.
Flash Point:
Not applicable.
NFPA Rating:
CAS# 7732-18-5: Not published.
CAS# 1310-73-2: Not published.
CAS# 10102-17-7: Not published.
Explosion Limits:
Lower: No information Upper: No information
Material Safety Data Sheet
Sodium hydroxide/sodium thiosulfate
Section 6 - Accidental Release Measures
General Information:
Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spills with absorbent (vermiculite, sand, fuller's earth) and place in plastic bags for later disposal. Material
may be neutralized to pH 7 with citric acid or other suitable neutralizing agent.
Section 7 - Handling and Storage
Handling:
Wash thoroughly after handling. Use with adequate ventilation. Do not get in eyes, on skin, or on clothing. Do not
ingest or inhale.
Storage:
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from strong acids. Keep
away from metals. Keep away from flammable liquids. Keep away from organic halogens. Store away from
incompatible substances especially where flammable or poisonous gases may accumulate in storage.
Section 8 - Exposure Controls, Personal Protection
Engineering Controls:
Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure
limits.
Exposure Limits
Chemical Name: ACGIH NIOSH OSHA
None of the components None of the components
None of the components
Water
are on this list. are on this list.
are on this list.
None of the components 2 mg/m3 TWA;
None of the components
Sodium hydroxide
are on this list.
are on this list.
None of the components None of the components
None of the components
Sodium thiosulfate
are on this list. are on this list.
are on this list.
OSHA Vacated PELs
Personal Protective Equipment
Eyes:
Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection
regulations in 29 CFR 1910.133.
Skin:
Wear appropriate gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29CFR 1910.134. Always use a NIOSH-approved respirator when
necessary.
Material Safety Data Sheet
Sodium hydroxide/sodium thiosulfate
Section 9 - Physical and Chemical Properties
Physical State: Liquid
Color: Clear
Odor: Not available.
pH: Alkaline
Vapor Pressure: 14 mm Hg
Vapor Density: No information found.
Evaporation Rate: No information found.
Viscosity: >1 (ether=1)
Boiling Point: 212掳F ( 100.00掳C)
Freezing/Melting Point: 32掳F ( 0.00掳C)
Decomposition Temperature: No information found.
Solubility in water: No information found.
Specific Gravity/Density: >1.5
Molecular Formula: NaOH
Molecular Weight 40
Section 10 - Stability and Reactivity
Chemical Stability:
Stable.
Conditions to Avoid:
Incompatible materials, acids.
Incompatibilities with Other Materials
Reacts with mineral acids to form corresponding salts; reacts with weak acids gases like hydrogen sulfide, sulfur
dioxide, and carbon dioxide; ignites when in contact with cinnamaldehyde or zinc; and reacts explosively with a
mixture of chloroform and methane. Corrosive to metals such as aluminum, tin, and zinc as well as to alloys such as
steel, and may cause formation of flammable hydrogen gas.
Hazardous Decomposition Products
Toxic fumes of sodium oxide, sodium peroxide fumes.
Hazardous Polymerization
Has not been reported.
Section 11 - Toxicological Information
RTECS:
CAS# 7732-18-5: ZC0110000.
CAS# 1310-73-2: WB4900000.
CAS# 10102-17-7: WE6660000.
Material Safety Data Sheet
Sodium hydroxide/sodium thiosulfate
LD50/LC50:
CAS# 7732-18-5:
Oral, rat: LD50 = >90 mL/kg.
CAS# 1310-73-2:
No information found.CAS# 10102-17-7:
Oral, mouse: LD50 = 2700 mg/kg.
Carcinogenicity:
CAS# 7732-18-5: Not listed as a carcinogen by ACGIH, IARC, NIOSH, NTP, OSHA, or CA Prop 65.
CAS# 1310-73-2: Not listed as a carcinogen by ACGIH, IARC, NIOSH, NTP, OSHA, or CA Prop 65.
CAS# 10102-17-7: Not listed as a carcinogen by ACGIH, IARC, NIOSH, NTP, OSHA, or CA Prop 65.
Epidemiology:
No information reported.
Teratogenicity:
No information reported.
Reproductive:
No information reported.
Mutagenicity
Mutation data reported.
Neurotoxicity
No information reported.
Section 12 - Ecological Information
Ecotoxicity:
TLm, mosquito fish, 125 ppm/96hr. (fresh water); TLm, bluegill, 99 mg/48hr.(tap water).
Environmental:
Once liquid, sodium hydroxide leaches rapidly into the soil.
Physical:
No information found.
Other:
No information found.
Section 13 - Disposal Considerations
Dispose of in accordance with federal, state, and local regulations.
Section 14 - Transport Information
US DOT
Shipping Name: Sodium Hydroxide solution
Hazard Class: 8
UN Number: UN1824
Material Safety Data Sheet
Sodium hydroxide/sodium thiosulfate
Packing Group: PG II
Section 15 - Regulatory Information
US Federal
TSCA
CAS# 7732-18-5 is listed on the TSCA Inventory.
CAS# 1310-73-2 is listed on the TSCA Inventory.
CAS# 10102-17-7 is not on the TSCA Inventory, however, its anhydrous form is on the inventory and so this hydrate
is exempt from TSCA Inventory requirements (40CFR270.3(u)(2)).
SARA Reportable Quantities (RQ)
CAS# 1310-73-2: final RQ = 1000 pounds (454 kg)
CERCLA/SARA Section 313
None of the components are on this list.
OSHA - Highly Hazardous
None of the components are on this list.
US State
State Right to Know
Sodium hydroxide can be found on the following state Right-to-Know lists: California, New Jersey, Florida,
Pennsylvania, Minnesota, Massachusetts.
California Regulations
European/International Regulations
Canadian DSL/NDSL
CAS# 7732-18-5 is listed on Canada's DSL List.
CAS# 1310-73-2 is listed on Canada's DSL List.
Canada Ingredient Disclosure List
CAS# 7732-18-5 is not listed on Canada's Ingredient Disclosure List.
CAS# 1310-73-2 is listed on Canada's Ingredient Disclosure List.
CAS# 10102-17-7 is not listed on Canada's Ingredient Disclosure List.
Section 16 - Other Information
MSDS Creation Date: November 29, 1998
Revision Date: August 24, 2004
Information in this MSDS is from available published sources and is believed to be accurate. No warranty,
express or implied, is made and Qorpak assumes no liability resulting from the use of this MSDS. The user
must determine suitability of this information for his application.
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