Product Identification

Product Name

Chromium oxide

Synonyms

Chrome oxide
Chromia
Green chrome oxide

CAS

1308-38-9

Formula

Cr2O3

Molecular Weight

151.99

EINECS

215-160-9

RTECS

GB6475000

RTECS Class

Tumorigen; Mutagen

Merck

12,2283

Beilstein/Gmelin

11116 (G)

Physical and Chemical Properties

Appearance

Light to dark green, fine crystals or powder.

Solubility in water

Insoluble

Melting Point

2435

Boiling Point

4000

Vapor Pressure

3 (2000 C)

Density

4.6 - 5 g/cm3

Usage

In abrasives & electric semiconductors, in alloys.

First Aid Measures

Ingestion

Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.

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

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

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

Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid contact with clothing and other combustible materials. Avoid ingestion and inhalation. Wash clothing before reuse.

Hazards Identification

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

May cause mild eye irritation.

Ingestion

Ingestion of large amounts may cause gastrointestinal irritation. May cause gastrointestinal irritation with nausea, vomiting and diarrhea.

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

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 a respirator's use. 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.

Exposure Effects

Prolonged or repeated skin contact may cause sensitization dermatitis and possible destruction and/or ulceration. Repeated inhalation may cause chronic bronchitis. May cause cancer according to animal studies.

Exposure limit(s)

OSHA TWA: 0.5 mg/m3 as chromium.

Poison Class

-

Fire Fighting Measures

Autoignition

Noncombustible

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. Substance is noncombustible. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Incompatibilities

Chlorine trifluoride.

Stability

Stable at room temperature in closed containers under normal storage and handling conditions.

Decomposition

Not known.

Transport Information

HS Code

2819 90 90