Product Identification

Product Name

D-(-)-3-Acetylthio-2-methylpropionic acid

Synonyms

(2S)-3-Acetylsulfanyl-2-methylpropanoate
(S)-3-(Acetylthio)-2-methylpropanoic acid
(S)-3-Acetylthio-2-methylpropionic acid
D-3-Acetylthio-2-methylpropionic acid

CAS

76497-39-7

Formula

C6H10O3S

Molecular Weight

162.21

EINECS

278-480-8

Beilstein/Gmelin

4373328

Physical and Chemical Properties

Appearance

Clear, colorless solid.

Solubility in water

Very soluble

Melting Point

131 - 132

Boiling Point

277

Vapor Pressure

0.0013 (25 C)

Density

1.18 g/cm3 (20 C)

pKa/pKb

4.22 (pKa)

Partition Coefficient

.88

Heat Of Vaporization

56.7 kJ/mol

Refractive Index

1.4902 (20 C)

First Aid Measures

Ingestion

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. Treat symptomatically and supportively. Get medical aid immediately. SPEED IS ESSENTIAL. A DOCTOR MUST BE NOTIFIED AT ONCE.

Inhalation

Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Store in a cool, dry place. Keep container closed when not in use.

Handling

Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale.

Hazards Identification

Ingestion

Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea.

Inhalation

May be fatal if inhaled. Harmful if inhaled. May cause respiratory tract irritation.

Skin

May cause skin irritation. Harmful if absorbed through the skin.

Eyes

May cause eye irritation.

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective 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 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures

Flash Point

162

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use agent most appropriate to extinguish fire.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.

Stability and Reactivity

Disposal Code

3

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidants.

Decomposition

Irritating and toxic fumes and gases.

Transport Information

HS Code

2930 90 70