MSDS Name:Mercaptoacetic acid
Synonym:Mercaptoacetic acid, Acetyl mercaptan, Thiolacetic acid, Thioglycollic aci

EMERGENCY OVERVIEW
Toxic by inhalation, in contact with skin and if swallowed. Causes burns.
Potential Health Effects
Eye:
Causes severe eye burns. May cause irreversible eye injury.
Skin:
Causes skin burns.
Ingestion:
Harmful if swallowed. Causes gastrointestinal tract burns.
Inhalation:
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema.
Chronic:
No information found.

Eyes: Get medical aid immediately. Do NOT allow victim to rub eyes or keep eyes closed. Gently lift eyelids and flush continuously with water.
Extensive irrigation with water is required (at least 30 minutes).
Skin:
Get medical aid immediately. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Do not induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Possible aspiration hazard. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician:

General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Combustion generates toxic fumes. Reacts with most metals to form highly flammable hydrogen gas which can form explosive mixtures with air. Reacts violently with water.
Extinguishing Media:
In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section.

Handling:
Wash thoroughly after handling. Use with adequate ventilation. Do not allow water to get into the container because of violent reaction. Follow all MSDS and label precautions even after container is emptied because they may contain product residues. Do not reuse this container. Do not get on skin or in eyes. Do not ingest or inhale. Keep from contact with clothing and other combustible materials. Discard contaminated shoes.
Storage:
Keep away from heat and flame. Do not store near combustible materials. Store in a cool, dry place. Keep container closed when not in use. Keep away from metals. Do not store in metal containers.

Engineering Controls:
Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits. Use substance with extreme caution and designate regulated areas for use. Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels.
Exposure Limits CAS# 68-11-1: United Kingdom, WEL - TWA: 1 ppm TWA; 3.8 mg/m3 TWA United Kingdom, WEL - STEL: 3 ppm STEL; 11.4 mg/m3 STEL Belgium - TWA: 1 ppm VLE; 3.9 mg/m3 VLE France - VME: 1 ppm VME; 5 mg/m3 VME Germany: 4 mg/m3 TWA Germany: Skin absorber Malaysia: 1 ppm TWA; 3.8 mg/m3 TWA Netherlands: 2 ppm STEL; 8 mg/m3 STEL Netherlands: 1 ppm MAC; 4 mg/m3 MAC Russia: 0.1 mg/m3 TWA Spain: 1 ppm VLA-ED; 3.8 mg/m3 VLA-ED Personal Protective Equipment Eyes: Not available.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHAs 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use.

Physical State: Liquid
Color: Not available.
Odor: Not available.
pH: Not available.
Vapor Pressure: 10 mm Hg @18 deg C
Viscosity: Not available.
Boiling Point: 123 deg C @ 29.00mm Hg
Freezing/Melting Point: 0 deg C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density: 1.3250g/cm3
Molecular Formula: HSCH2COOH
Molecular Weight: 92.12

Chemical Stability:
Oxidizes when exposed to air.
Conditions to Avoid:
Incompatible materials.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong bases, metals, steel.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, sulfur oxides (SOx), including sulfur oxide and sulfur dioxide.
Hazardous Polymerization: Will not occur.

RTECS#:
CAS# 68-11-1: AI5950000 LD50/LC50:
CAS# 68-11-1: Inhalation, rat: LC50 = 210 mg/m3/4H; Oral, mouse: LD50 = 242 mg/kg; Oral, rabbit: LD50 = 119 mg/kg; Oral, rat: LD50 = 114 mg/kg.
Carcinogenicity:
Mercaptoacetic acid - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Dispose of in a manner consistent with federal, state, and local regulations.

IATA
Shipping Name: THIOGLYCOLIC ACID
Hazard Class: 8
UN Number: 1940
Packing Group: II
IMO
Shipping Name: THIOGLYCOLIC ACID
Hazard Class: 8
UN Number: 1940
Packing Group: II
RID/ADR
Shipping Name: THIOGLYCOLIC ACID
Hazard Class: 8
UN Number: 1940
Packing group: II

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T
Risk Phrases:
R 23/24/25 Toxic by inhalation, in contact with skin
and if swallowed.
R 34 Causes burns.
Safety Phrases:
S 2 Keep out of reach of children.
S 25 Avoid contact with eyes.
S 27 Take off immediately all contaminated clothing.
S 28C After contact with skin, wash immediately with
a sodium borate solution.
WGK (Water Danger/Protection)
CAS# 68-11-1: 1
Canada
CAS# 68-11-1 is listed on Canadas DSL List.
CAS# 68-11-1 is listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 68-11-1 is listed on the TSCA inventory.