Product Identification
【Product Name】o-Cresolsulfonphthalein；甲酚红
【CAS】1733-12-6
【Formula】C21H18O5S
【Molecular Weight】382.44
【EINECS】217-064-2
【Merck】13,2607
【Beilstein/Gmelin】343399
【Beilstein Reference】5-19-03-00460

Physical and Chemical Properties
【Appearance】Reddish brown or green crystalline powder, odorless.
【Solubility in water】Insoluble
【Melting Point】290℃
【pKa/pKb】9.39 (pKa)
【Usage】Used as a indicator.

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.
【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】Store in a cool, dry place. Store in a tightly closed container.
【Handling】Wash thoroughly after handling. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification
【Ingestion】The toxicological properties of this substance have not been fully investigated.
【Inhalation】The toxicological properties of this substance have not been fully investigated.
【Skin】No information regarding skin irritation and other potential effects was found.
【Eyes】No information regarding eye irritation and other potential effects was found.
【EC Safety Phrase】S 22 24/25

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.

Fire Fighting Measures
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use agent most appropriate to extinguish fire.

Accidental Release Measures
【Small spills/leaks】Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.

Stability and Reactivity
【Disposal Code】3
【Stability】Stable under normal temperatures and pressures.
【Incompatibilities】Strong oxidizing agents.
【Decomposition】Carbon monoxide, oxides of sulfur, carbon dioxide.

Transport Information
【HS Code】2934 99 90