Product Identification

Product Name

2,4-Diaminobenzenesulfonic acid

Synonyms

1,3-Diaminobenzene-4-sulfonic acid
1,3-Diaminobenzene-6-sulfonic acid
1,3-Diaminobenzenesulfonic acid
2,4-Diaminobenzenesulfonic acid
4-n-Butylbenzoic acid
4-Sulfo-1,3-diaminobenzene
m-Phenylenediamine-4-sulfonic acid
p-Butylbenzoic acid

CAS

20651-71-2

CAS

88-63-1

Formula

C11H14O2

Formula

C6H8N2O3S

Molecular Weight

178.23

Molecular Weight

188.2

EINECS

201-846-5

EINECS

243-940-9

RTECS

DB5900000

RTECS Class

Primary Irritant

Beilstein/Gmelin

2694057

Beilstein/Gmelin

2044046

Beilstein Reference

4-09-00-01880

Beilstein Reference

2-14-00-00443

Physical and Chemical Properties

Appearance

Liquid.

Appearance

White crystalline powder.

Solubility in water

Slightly soluble

Solubility in water

Very soluble

Melting Point

100-103

Boiling Point

313

Boiling Point

406

pKa/pKb

4.36 (pKa)

pKa/pKb

2.90 (pKa)

Partition Coefficient

3.33

Partition Coefficient

-.41

First Aid Measures

Ingestion

Get medical aid. Wash mouth out with water.

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

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

Inhalation

May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.

Skin

May cause skin irritation.

Skin

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

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

May cause eye irritation.

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 cool, dry place. Store in a tightly closed container.

Storage

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

Handling

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

Handling

Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.

Hazards Identification

Ingestion

May cause irritation of the digestive tract. May be harmful if swallowed.

Ingestion

May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.

Inhalation

Causes respiratory tract irritation. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. May be harmful if inhaled. May cause burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.

Skin

Causes skin irritation. May be harmful if absorbed through the skin.

Eyes

Causes 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 and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Personal Protection

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. Runoff from fire control or dilution water may cause pollution. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use foam, dry chemical, or carbon dioxide.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container.

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Stability

No data.

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong bases, oxidizing agents.

Incompatibilities

Strong oxidizing agents, acids, acid chlorides, carbon dioxide, acid anhydrides.

Decomposition

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

Decomposition

Nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.