Product Identification

Product Name

C.I. Oxidation base 16

Synonyms

1,2-Diaminobenzene
Benzene-1,2-diamine

CAS

95-54-5

Formula

C6H8N2

Molecular Weight

108.14

EINECS

202-430-6

RTECS

SS7875000

RTECS Class

Mutagen

Merck

12,7438

Beilstein/Gmelin

606074

Beilstein Reference

4-13-00-00038

EC Index Number

612-145-00-2

EC Class

Carcinogenic Category 3; Mutagenic Category 3; Toxic; Harmful; Irritant; Sensitising; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Colorless monoclinic crystals, darkens in air.

Solubility in water

54 g/L

Melting Point

103

Boiling Point

257

Vapor Pressure

0.015 (25 C)

Density

1.21 g/cm3

pKa/pKb

9.54 (pKb)

Partition Coefficient

.15

Heat Of Vaporization

45.5 kJ/mol

Heat Of Combustion

-3511 kJ/mol

Usage

Manufacture of dyes, photographic developing agent, organic synthesis, laboratory reagent.

First Aid Measures

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. Get medical aid. Wash mouth out with water.

Inhalation

Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear. DO NOT use mouth-to-mouth respiration.

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

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 tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Minimize dust generation and accumulation. Avoid contact with skin and eyes. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Wash clothing before reuse.

Hazards Identification

Inhalation

Dust is irritating to the respiratory tract. Methemoglobinemia is characterized by dizziness, drowsiness, headache, breath shortness, cyanosis with bluish skin, rapid heart rate and chocolate-brown blood. Inhalation of aniline causes anoxia due to the formation of methemoglobinemia.

Skin

May cause skin irritation. May be absorbed through the skin in harmful amounts.

Eyes

May cause eye irritation. May result in corneal injury.

Ingestion

May cause irritation of the digestive tract. May cause liver and kidney damage. Methemoglobinemia is characterized by dizziness, drowsiness, headache, breath shortness, cyanosis with bluish skin, rapid heart rate and chocolate-brown colored blood. May be harmful if swallowed. Overexposure may cause methemoglobinemia.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.

EC Risk Phrase

R 20/21 25 36 40 43 50/53 68

EC Safety Phrase

S 28 36/37 45 60 61

UN (DOT)

1673

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 a chemical apron. Wear appropriate 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.

Exposure Effects

Prolonged or repeated skin contact may cause dermatitis. May cause methemoglobinemia, which is characterized by chocolate-brown colored blood, headache, weakness, dizziness, breath shortness, cyanosis, rapid heart rate, unconsciousness and possible death.

Exposure limit(s)

0.1 mg/m3 TLV

Poison Class

3

Fire Fighting Measures

Flash Point

110

Autoignition

540

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. Use water spray to keep fire-exposed containers cool. Containers may explode when heated. Combustible material; may burn but does not ignite readily. Extinguishing media: For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out.

Upper exp. limit

9.8

Lower exp. limit

1.5

Fire Potential

This material is probably combustible.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Disposal Code

9

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

1673

Hazard Class

6.1

Packing Group

III

HS Code

2921 51 19