Product Identification
【Product Name】6,7-Dihydroxycoumarin
【Synonyms】Esculetol 6,7-二羟基香豆素
【CAS】305-01-1
【Formula】C9H6O4
【Molecular Weight】178.14
【EINECS】206-161-5
【RTECS】GN6382500
【RTECS Class】Drug; Natural Product
【Merck】13,3731
【Beilstein/Gmelin】152788
【Beilstein Reference】5-18-03-00202

Physical and Chemical Properties
【Appearance】Yellow crystalline powder.
【Solubility in water】Soluble
【Melting Point】267℃
【Boiling Point】470℃
【Vapor Pressure】2E-9 (25℃)
【pKa/pKb】8.63 (pKa)
【Partition Coefficient】.55
【Heat Of Vaporization】76.0 kJ/mol
【Usage】Substance is used in filters for absorption of ultraviolet light.

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.
【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. 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】May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. 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.
【Hazards】Contact with metals may evolve flammable hydrogen gas.
【EC Risk Phrase】R 36/37/38
【EC Safety Phrase】S 26 36
【UN (DOT)】1759

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
【Flash Point】201℃
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
【Fire Potential】Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

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

Stability and Reactivity
【Incompatibilities】Oxidizing agents.
【Stability】Stable under normal temperatures and pressures.
【Decomposition】Hydrogen chloride, nitrogen oxides, carbon monoxide, carbon dioxide.
【Combustion Products】Fire may produce irritating, corrosive and/or toxic gases.

Transport Information
【UN Number】1759
【Hazard Class】8
【Packing Group】I; II; III