氢氟酸的MSDS un no1790.doc

MATERIAL SAFETY DATA SHEET 1. IDENTIFICATION General Product Name : HYDROFLUORIC ACID Other Names : HYDROGEN FLUORIDE ，FLUOROHYDRIC ACID UN No. : 1790 Dangerous Goods Class : 8 Subsidiary Risk : 61 Hazchem Code : 4WE Pack Group : I EPG : 40 Poisons Schedule : 7 Uses : Chemical intermediate, etching and polishing of glass and pottery, cleaning of metals, mineral extraction. 1.1 Physical Description / Properties Appearance : A colourless liquid with a sharp irritating odour which forms a dense cloud of vapour on release to the atmosphere. Formula : HF Boiling Point : 19.5 deg C Melting Point : -88.5 deg C Vapour Pressure : 900 mm Hg (1 atmosphere) Specific Gravity : 1.002 (water = 1) Flash Point : N/A pH : 1 (@ 70%) Solubility in water : Misc g/l (25 deg C) Flammability Limits (as percentage volume in air) Lower Explosion Limit : N/A Upper Explosion Limit : N/A 1.2 Other Properties HF acid as liquid or vapour is extremely corrosive and toxic Concentrations in excess of 10ppm are intolerable to breath Concentrations of 25ppm may be fatal Solubility in water = miscible. Evaporation rate = 100% at ambient temperature. 1.3 Ingredients Chemical Entity CAS No. Proportions (%) HYDROFLUORIC ACID [ 7664-39-3] 70 2. HEALTH HAZARD INFORMATION 2.1 Health Effects - Acute Swallowed Severe burning and/or perforation of the digestive system which may lead to death. Very toxic if ingested. Eye Hydrogen fluoride vapours can dissolve in the moisture on the surface of the eyes and cause irritation. Splashing into the eyes may cause severe and irreversible damage with possible corneal scarring and permanent blindness. Skin Hydrogen fluoride can cause deep and excrutiatingly painful skin burns. Burns from strong solutions (50-70%) are felt immediately. Weaker solutions (25%) may take a few minutes to be noticed. Serious skin splashes have caused death. Inhaled Weak vapour concentrations of a few ppm can produce irritation of the nose, throat, eye