Product Identification

Product Name

DL-Cysteine hydrochloride

Synonyms

(+/-)-Cysteine hydrochloride
2-Amino-3-sulfanylpropanoic acid hydrochloride

CAS

10318-18-0

Formula

C3H7NO2S.ClH

Molecular Weight

157.62

EINECS

233-698-2

RTECS

HA2200000

RTECS Class

Reproductive Effector

Beilstein/Gmelin

4150473

Beilstein Reference

4-04-00-03145

Physical and Chemical Properties

Appearance

White solid.

Melting Point

>180

Density

>1.0 g/cm3 (20 C)

Usage

L form is a nonessential amino acid in humans. Important in protein crosslinking.

First Aid Measures

Ingestion

Wash mouth out with water. Get medical aid if irritation or symptoms occur.

Inhalation

Remove from exposure to fresh air immediately. Get medical aid if cough or other symptoms appear.

Skin

Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. If irritation develops, get medical aid.

Handling and Storage

Storage

Store in a cool, dry place. Keep container closed when not in use. No special precautions indicated.

Handling

Wash hands before eating. Minimize dust generation and accumulation. Use with adequate ventilation.

Hazards Identification

Ingestion

Expected to be a low ingestion hazard.

Inhalation

Low hazard for usual industrial handling.

Skin

Non-irritating to the skin.

Eyes

May cause mild 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 minimize contact with skin.

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

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. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use agent most appropriate to extinguish fire.

Accidental Release Measures

Small spills/leaks

Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.