Hydrogen fluoride

Acute toxicity - Category 2, Oral

Acute toxicity - Category 1, Dermal

Skin corrosion, Sub-category 1A

Acute toxicity - Category 2, Inhalation

H300 Fatal if swallowed

H310 Fatal in contact with skin

H314 Causes severe skin burns and eye damage

H318 Causes serious eye damage

H330 Fatal if inhaled

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P320 Specific treatment is urgent (see … on this label).

P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405 Store locked up.

P403+P233 Store in a well-ventilated place. Keep container tightly closed.

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

P262 Do not get in eyes, on skin, or on clothing.

P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P271 Use only outdoors or in a well-ventilated area.

P284 [In case of inadequate ventilation] wear respiratory protection.

P301+P316 IF SWALLOWED: Get emergency medical help immediately.

P321 Specific treatment (see ... on this label).

P330 Rinse mouth.

P302+P352 IF ON SKIN: Wash with plenty of water/...

P316 Get emergency medical help immediately.

P361+P364 Take off immediately all contaminated clothing and wash it before reuse.

P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P363 Wash contaminated clothing before reuse.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P320 Specific treatment is urgent (see ... on this label).

P405 Store locked up.

P403+P233 Store in a well-ventilated place. Keep container tightly closed.

P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

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Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention.

Wear protective gloves when administering first aid. Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer immediately for medical attention.

Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention.

Rinse mouth. Give nothing to drink. Do NOT induce vomiting. Refer immediately for medical attention.

Ingestion of an estimated 1.5 grams produced sudden death without gross pathological damage. Repeated ingestion of small amounts resulted in moderately advanced hardening of the bones. Contact of skin with anhydrous liquid produces severe burns. Inhalation of anhydrous hydrogen fluoride or hydrogen fluoride mist or vapors can cause severe respiratory tract irritation that may be fatal. (EPA, 1998)

Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary . Monitor for shock and treat if necessary . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water if the patient can swallow, has a strong gag reflex, and does not drool. Do not attempt to neutralize because of exothermic reaction. Cover skin burns with dry, sterile dressings after decontamination . Hydrofluoric Acid (HF) and Related Compounds

If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Hydrofluoric acid solution

When heated, it emits highly corrosive fumes of fluorides. Its corrosive action on metals can result in formation of hydrogen in containers and piping to create fire hazard. Toxic and irritating vapors are generated when heated. Will attack glass, concrete, and certain metals, especially those containing silica, such as cast iron. Will attack natural rubber, leather, and many organic materials. May generate flammable hydrogen gas in contact with some metals. (EPA, 1998)

In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position.

Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Ventilation. Cover the spilled material with dry sand or dry earth. Collect the spilled substance into containers. Then store and dispose of according to local regulations.

Evacuate danger area! Consult an expert! Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Ventilation. Remove vapour with fine water spray.

1. ventilate area of spill or leak to disperse gas. 2. if in gaseous form, stop flow of gas. if source of leak is cylinder & leak cannot be stopped ... remove ... to safe place in open air, & repair leak or allow cylinder to empty. 3. if in liq form, allow to vaporize & disperse the gas.

NO contact with incompatible substances. See Chemical Dangers. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Cool. Fireproof if in building. Keep in a well-ventilated room. Separated from food and feedstuffs and incompatible materials. Store in an area without drain or sewer access. See Chemical Dangers.Hydrogen fluoride must be stored to avoid contact with metals, concrete, glass, and ceramics, because it can severely corrode these materials. Contact with metals may form a flammable gas. Keep away from heat. Where possible automatically pump liquid from drums or other storage containers to process containers.

TLV: (as F): 0.5 ppm as TWA; 2 ppm as STEL; (skin); BEI issued.MAK: (as F): 0.83 mg/m3, 1 ppm; peak limitation category: I(2); pregnancy risk group: C.EU-OEL: 1.5 mg/m3 as TWA; 2.5 mg/m3 as STEL

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Ensure adequate ventilation. Handle in accordance with good industrial hygiene and safety practice. Set up emergency exits and the risk-elimination area.

Wear face shield or eye protection in combination with breathing protection.

Protective gloves. Protective clothing. Apron.

Use ventilation, local exhaust or breathing protection.

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The substance is a strong acid. It reacts violently with bases and is corrosive. Reacts violently with many compounds. This generates fire and explosion hazard. It reacts violently with bases and is corrosive to most common metals forming a flammable/explosive gas (hydrogen - see ICSC 0001). Attacks glass, some forms of plastic, rubber and coatings.

Over time hydrogen fluoride/hydrofluoric acid corrodes metals, releasing flammable hydrogen.Hydrogen fluoride/hydrofluoric acid reacts with water or steam creating toxic and corrosive fumes.Hydrogen fluoride/hydrofluoric acid attacks glass, ceramics, concrete, some forms of plastic, rubber, and coatings.Hydrogen fluoride/hydrofluoric acid is very reactive with most bases, acids, and oxidants and should not be stored with them.

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NON-FLAMMABLE ...Hydrogen fluoride/hydrofluoric acid vapors may collect and stay in poorly-ventilated, low-lying, or confined areas (e.g., sewers, basements, and tanks).Hazardous concentrations may develop quickly in enclosed, poorly-ventilated, or low-lying areas. Keep out of these areas. Stay upwind.HYDROGEN FLUORIDE, ANHYDROUS attacks glass and any other silica containing material. May react with common metals (iron, steel) to generate flammable hydrogen gas if diluted below 65% with water. Reacts exothermically with chemical bases (examples: amines, amides, inorganic hydroxides). Can initiate polymerization in certain alkenes. Reacts with cyanide salts and compounds to release gaseous hydrogen cyanide. May generate flammable and/or toxic gases with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides. Additional gas-generating reactions may occur with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), and carbonates. Can catalyze (increase the rate of) chemical reactions. Reacts explosively with cyanogen fluoride, methanesulfonic acid or glycerol mixed with nitric acid. Reacts violently with arsenic trioxide, phosphorus pentachloride, acetic anhydride, alkali metals, ammonium hydroxide, chlorosulfonic acid, ethylenediamine, fluorine, potassium permanganate, oleum, propylene oxide, vinyl acetate, mercury(II) oxide. Emits highly corrosive fumes of hydrogen fluoride gas when heated [Sax, 9th ed., 1996, p. 1839]. Contact with many silicon compounds and metal silicides causes violent evolution of gaseous silicon tetrafluoride [Mellor, 1956, Vol. 2, suppl. 1, p. 121].

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A super strong acid, aqueous solutions are less strong. Violent reaction with bases. Reacts, possibly with violence, with many compounds including acetic anhydride, aliphatic amines, alcohol, alkanolamines, alkylene oxides, aromatic amines, amides, 2-aminoethanol, ammonia, ammonium hydroxide, arsenic trioxide, bismuthic acid, calcium oxide, ethylene diamine, ethyleneimine, epichlorohydrin, isocyanates, metal acetyllides, nitrogen trifluoride, oleum, organic anhydrides, oxygen difluoride, phosphorus pentoxide, sulfuric acid, strong oxidizers, vinyl acetate, vinylidene fluoride. Attacks some plastics, rubber, and coatings.

When heated to decomp it emits highly corrosive fumes of ... /hydrogen fluoride/.

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Fluoride has been observed to cross the placenta in humans. Dental fluorosis can occur in a child's teeth when the mother receives high levels of fluoride during pregnancy. In some animal studies, oral exposure to fluoride has caused impaired reproduction and malformation of fetal bones and teeth. Inhalation of hydrogen fluoride resulted in degenerative testicular changes in male dogs. Menstrual irregularities have been observed in women occupationally exposed to fluoride; no differences were found in the numbers of pregnancies, miscarriages, or births.

The substance is very corrosive to the eyes, skin and respiratory tract. Inhalation of the vapour may cause lung oedema. Inhalation may cause asthma-like reactions (RADS). Exposure could cause asphyxiation due to swelling in the throat. Inhalation may cause pneumonitis. See Notes. Exposure could cause hypocalcemia. The effects may be delayed. Exposure above the OEL could cause death.

Fluoride can accumulate in teeth, joints and bones. This may result in stained tooth enamel up to joint and bone disorders (fluorosis).

A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C.

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The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

ADR/RID: UN1790 (For reference only, please check.)

IMDG: UN1790 (For reference only, please check.)

IATA: UN1790 (For reference only, please check.)

ADR/RID: HYDROFLUORIC ACID, with more than 60% hydrogen fluoride (For reference only, please check.)

IMDG: HYDROFLUORIC ACID, with more than 60% hydrogen fluoride (For reference only, please check.)

IATA: HYDROFLUORIC ACID, with more than 60% hydrogen fluoride (For reference only, please check.)

ADR/RID: 8 (For reference only, please check.)

IMDG: 8 (For reference only, please check.)

IATA: 8 (For reference only, please check.)

ADR/RID: I (For reference only, please check.)

IMDG: I (For reference only, please check.)

IATA: I (For reference only, please check.)

ADR/RID: No

IMDG: No

IATA: No

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The occupational exposure limit value should not be exceeded during any part of the working exposure.The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.Isolate contaminated clothing by sealing in a bag or other container.UN number for hydrogen fluoride as a gas is 1052, hazard class 8, subsidiary hazard 6.1, packing group 1.The partial vapour pressure is 20 kPa at 25 °C.