Product Identification

Product Name

2-Phenyl-1H-benzo[d]imidazole-5-sulfonic acid

Synonyms

2-Phenyl-1H-benzimidazole-5-sulfonic acid
2-Phenyl-5-sulfobenzimidazole
2-Phenylbenzimidazole-5-sulfonic acid
Ensulizole
Neo Heliopan Hydro
Novantisol

CAS

27503-81-7

Formula

C13H10N2O3S

Molecular Weight

274.29000000000002

EINECS

248-502-0

Beilstein/Gmelin

922664

Physical and Chemical Properties

Appearance

White crystalline powder.

Solubility in water

Very soluble

Melting Point

418

pKa/pKb

4.45 (pKa)

Partition Coefficient

2.63

Usage

Uva protective agent.

Vapor Density

9.46

First Aid Measures

Ingestion

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 immediately.

Inhalation

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

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

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

Handling and Storage

Storage

Keep container closed when not in use. 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.

Hazards Identification

Ingestion

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

Inhalation

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

Skin

May cause skin irritation.

Eyes

Dust may cause mechanical irritation.

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 26 36

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

Flash Point

>100

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 appropriate 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

Stability

Stable under normal temperatures and pressures. May decompose when exposed to light.

Incompatibilities

Strong oxidizing agents, strong acids, strong bases.

Decomposition

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

Transport Information

HS Code

2933 99 90