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MSDS 
:
 Mercaptoacetic acid
CAS 
:
 68-11-1
SYNONYMS 
:
 Mercaptoacetic acid, Acetyl mercaptan, Thiolacetic acid,     Thioglycollic acid
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 68-11-1 |Mercaptoacetic acid | 95 | 200-677-4 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: T
Risk Phrases: 23/24/25 34

**** SECTION 3 - HAZARDS IDENTIFICATION ****

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.

**** SECTION 4 - FIRST AID MEASURES ****

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:

**** SECTION 5 - FIRE FIGHTING MEASURES ****

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.

**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

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.

**** SECTION 7 - HANDLING and STORAGE ****

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.

**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****

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 OSHA's 29
CFR 1910.134 and ANSI Z88.2 requirements or European
Standard EN 149 must be followed whenever workplace
conditions warrant respirator use.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

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

**** SECTION 10 - STABILITY AND REACTIVITY ****

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.

**** SECTION 11 - TOXICOLOGICAL INFORMATION ****

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.

**** SECTION 12 - ECOLOGICAL INFORMATION ****



**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

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

**** SECTION 14 - TRANSPORT INFORMATION ****

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

**** SECTION 15 - REGULATORY INFORMATION ****

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 Canada's DSL List.
CAS# 68-11-1 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 68-11-1 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

MSDS Creation Date: 10/23/1998 Revision #2 Date: 9/20/2004

The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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