GB No. 81016
CAS No. 7664-39-3
Molecular Formula HF
molecular 20.01

colorless, transparent irritating odor of liquid. Goods for 40% of the solution; The boiling point of 120 ° C (35.3%); Melting point -83.1 ° C (pure); Solubility : Compatibility with water; Density : relative density (water = 1) 1.26 (75%); The relative density (Air = 1) 1.27; Stability : stability; risk Marker 20 (corrosive acid); the main purposes : reagents for the analysis, the preparation of high purity fluoride, glass etching, electroplating and surface treatment.

2. The impact on the environment :
a health hazard

pathways : inhaled, ingested, percutaneous absorption.
health hazards : a strong skin corrosion can penetrate the skin to the deep penetration, and the formation of necrotic ulcers, which can not be cured. Eye exposure to high concentrations of hydrofluoric acid can cause corneal perforation. Contact its vapors, can occur bronchitis and pneumonia. Long-term exposure can occur with chronic respiratory inflammation, caused periodontitis, fluoride bone disease.

two, toxicology information and environmental behavior

acute toxicity : LC₅₀1276ppm, 1 hour (rat inhalation)
subacute and chronic toxicity : 33 ~ rabbit inhalation 41mg/m3 average 20mg/m3, after a ~ 5.5 months, there will be irritation, weight loss, difficulty breathing, decreased hemoglobin, the number of reticulocytes, some animals died.
Mutagenicity : DNA damage : Black flies stomach inhalation 1300ppb (six weeks). Sex chromosome loss and separation : black flies inhalation 2900ppb stomach.
reproductive toxicity : rat inhalation poisoning minimum concentration (TCL0) : 4980ug/m3 (to a pregnant 22 days), cause stillbirth.

hazardous characteristics : extremely corrosive. H foam immediately encountered combustion. With the reaction of ordinary metals, and produce hydrogen with air to form an explosive mixture.
combustion (decomposition) products : hydrogen fluoride.

3. Emergency Monitoring Methods :

4. Laboratory monitoring methods :
ion chromatography
Ultrapure acid by Inductively Coupled Plasma Mass Spectrometry analysis published in the British ] / Paulsen P.J.; Beary cream; Bushee D.S. / / Anal.Chem. - 1988, 60 (10) .- 971 ~ 975 "Analysis of Chemical Abstracts" 1990.4.

5.环境标准:
中国(TJ36-79)车间空气中有害物质的æœ?«˜å®¹è®¸æµ“度 1mg/m3[F]

6. Emergency treatment and disposal methods :
a leakage contingency

leak contaminated areas evacuated personnel to a safe area, not to prohibit access to the contaminated area, the proposed emergency personnel wearing masks, wearing chemical protective clothing. Do not direct contact with leakage, in ensuring the safety of plugging. Spray-water, reduce evaporation. Use sand, dry lime or soda ash mixture, then collect and transport the waste to disposal sites. We could also use a lot of water washing, Add Water dilution of the wastewater system. If large spills, using a causeway asylum, and then to collect, transfer, recycling or waste processed sound.

two protective measures

respiratory protection : its possible exposure to vapor or smoke, wearing gas masks or gas-helmet. Emergency rescue or escape, it is recommended to wear self-contained breathing apparatus.
eye protection : Wear protective chemical safety glasses.
protective clothing : wearing overalls (anti-corrosion material).
hand protection : Wear rubber gloves.
other : work, take a shower. Separate storage of toxic pollution by the clothes, washed reuse. To maintain good health habits.

three, and emergency measures

contact with the skin : the pollution off clothing, mobile water rinse for 10 minutes or 2% sodium bicarbonate solution rinse. If it burns, medical care treatment.
eye contact : immediately filed eyelid, mobile or saline irrigation water for at least 15 minutes. Medical treatment.
Inhalation : rapidly from the scene to fresh air. To keep the airway patency. Difficult to breathe oxygen. Give 2-4% sodium bicarbonate solution aerosol inhalation. Medical treatment. Fresh into
: coverage to persons or egg white blues. Immediate medical treatment.

fire fighting methods : mist of water and a foam.