Product Identification
【Product Name】Thiobenzoic acid
【Synonyms】Benzoyl thiol 硫代苯甲酸
【CAS】98-91-9
【Formula】C7H6OS
【Molecular Weight】138.19
【EINECS】202-712-9
【RTECS】DH6839000
【RTECS Class】Drug
【Beilstein/Gmelin】1071790
【Beilstein Reference】4-09-00-01364
【EC Class】irritant

Physical and Chemical Properties
【Appearance】Clear yellow liquid.
【Solubility in water】Very soluble
【Melting Point】24℃
【Boiling Point】222℃
【Vapor Pressure】0.1 (25℃)
【Density】1.1775 g/cm3 (20℃)
【pKa/pKb】3.61 (pKa)
【Partition Coefficient】2.11
【Heat Of Vaporization】45.9 kJ/mol
【Vapor Density】4.7
【Refractive Index】1.6040 (20℃)

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】Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
【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】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】Keep container closed when not in use. Store in a tightly closed container. Refrigerator (approx 4 C).
【Handling】Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation.

Hazards Identification
【Inhalation】Causes respiratory tract irritation. Can produce delayed pulmonary edema.
【Skin】Causes skin irritation.
【Eyes】Causes eye irritation. May cause chemical conjunctivitis.
【Ingestion】May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
【EC Risk Phrase】R 36/37/38
【EC Safety Phrase】S 26 36/37/39
【UN (DOT)】3334

Exposure Controls/Personal Protection
【Personal Protection】Eyes: Wear appropriate protective eyeglasses or chemical safety ggles 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.
【Exposure Effects】Effects may be delayed.

Fire Fighting Measures
【Flash Point】88℃
【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. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use agent most appropriate to extinguish fire.

Accidental Release Measures
【Small spills/leaks】Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation.

Stability and Reactivity
【Stability】Stable at room temperature in closed containers under normal storage and handling conditions.
【Incompatibilities】Strong acids, strong bases, strong oxidizing agents, strong reducing agents.
【Decomposition】Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide.

Transport Information
【UN Number】3334
【HS Code】2930 90 70