Product Identification

Product Name

4-(beta-D-Galactosido)-D-glucose

Synonyms

4-(b-D-Galactosido)-D-glucose
D-Glucose, 4-O-b-D-galactopyranosyl
D-Lactose
Lactin
Lactobiose
Milk sugar

CAS

63-42-3

Formula

C12H22O11

Molecular Weight

342.3

EINECS

200-559-2

RTECS

OD9625000

RTECS Class

Tumorigen; Reproductive Effector; Natural Product

Merck

12,5356

Beilstein/Gmelin

93796

Beilstein Reference

4-17-00-03066

Physical and Chemical Properties

Appearance

White hard crystalline powder.

Solubility in water

Very soluble

Melting Point

222.8

Boiling Point

592

pKa/pKb

12.39 (pKa)

Partition Coefficient

-4.12

Usage

Both forms of lactose are employed, with the form predominating: as a nutrient in preparing modified milk and food for infants and convalescents (whittier).

First Aid Measures

Ingestion

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

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

Handling and Storage

Storage

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

Handling

Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Low hazard for usual industrial handling.

Inhalation

Low hazard for usual industrial handling.

Skin

May cause skin irritation. Low hazard for usual industrial handling.

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

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 spray, dry chemical, carbon dioxide, or chemical foam.

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

Incompatibilities

Oxidizers.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, carbon dioxide.