Neutral ammonium fluoride
NH4F
Molecular mass: 37.0
ICSC # 1223
CAS # 12125-01-8
RTECS # BQ6300000
UN # 2505
EC # 009-006-00-8
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: water in large amounts to knock down acid vapors, then use appropriate extinguishing agent.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
Pain.
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Face shield
or
eye protection in combination with breathing protection if powder.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Diarrhoea.
Nausea.
Vomiting.
Abdominal pain.
Burning sensation.
Shock or collapse.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Do NOT induce vomiting.
Give plenty of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into dry plastic containers.
Carefully collect remainder,
then remove to safe place.
Personal protection: P3 filter respirator for toxic particles.
Do NOT let this chemical enter the environment.
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Separated from
incompatible materials
,
food and feedstuffs
.
See Chemical Dangers.
Dry.
Well closed.
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Do not transport with food and feedstuffs.
T symbol
R: 23/24/25
S: 1/2-26-45
UN Hazard Class: 6.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS
CRYSTALS
OR
WHITE
POWDER.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
producing
toxic and corrosive fumes
including
hydrogen fluoride
and
ammonia
.
The solution in water is a weak acid.
Reacts with chlorine trifluoride
causing explosion hazard.
Attacks glassandmetal.
Occupational Exposure Limits:
TLV: (as fluorine) 2.5 mg/m3 as TWA; A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2004).
MAK: (as F) (Inhalable fraction) 1 mg/m3
Peak limitation category: I(4);
skin absorption (H);
Pregnancy risk group: C;
(DFG 2005).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol
and
by ingestion.
Inhalation Risk:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
,
the skin
and
the respiratory tract
.
Corrosive on ingestion.
Effects of Long-Term or Repeated Exposure:
The substance may have effects on the bones and teeth
, resulting in fluorosis.
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Physical
Properties
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Melting point: sublimes
Density: 1.01
g/cm3
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Solubility in water, g/100 ml at 25°C: 45.3
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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Card has been partly updated in April 2005 and October 2005. See section Occupational Exposure Limits.
Transport Emergency Card: TEC (R)-61GT5-III
NFPA Code: H3; F0; R0;
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ADDITIONAL INFORMATION
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ICSC: 1223
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AMMONIUM FLUORIDE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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