Beryllium difluoride
BeF2
Molecular mass: 47.0
ICSC # 1355
CAS # 7787-49-7
RTECS # DS2800000
UN # 1566
EC # 004-002-00-2
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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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Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
AVOID ALL CONTACT!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Cough.
Sore throat.
Shortness of breath.
Symptoms may be delayed (see Notes).
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Closed system and ventilation.
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Fresh air, rest.
Half-upright position.
Refer for medical attention.
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•Skin
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Redness.
Pain.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
Blurred vision.
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Face shield
or
eye protection in combination with breathing protection.
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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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Abdominal pain.
Diarrhoea.
Nausea.
Vomiting.
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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Rinse mouth.
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 sealable containers; if appropriate, moisten first to prevent dusting.
Carefully collect remainder,
then remove to safe place.
Do NOT let this chemical enter the environment.
Chemical protection suit including self-contained breathing apparatus.
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Separated from
strong acids,
food and feedstuffs
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Well closed.
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Unbreakable packaging; put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs.
Note: A, E
T+ symbol
N symbol
R: 49-25-26-36/37/38-43-48/23-51/53
S: 53-45-61
UN Hazard Class: 6.1
UN Packing Group: II
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Important Data
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Physical State; Appearance:
COLOURLESS
LUMPS
Physical Dangers:
Chemical Dangers:
Reacts
with
strong acids
.
Occupational Exposure Limits:
TLV: (as Be) 0.002 mg/m3 as TWA, 0.01 mg/m3 as STEL; A1 (confirmed human carcinogen); Intended change : 0.00005 mg/m3 as TWA; 0.0002 mg/m3 as STEL; (skin); SEN; A1 (confirmed human carcinogen); (ACGIH 2008).
MAK: sensitization of respiratory tract and skin (Sah);
Carcinogen category: 1;
(DFG 2008).
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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:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.
Effects of Short-Term Exposure:
The substance
is severelyirritating to
the eyes
,
the skin
and
the respiratory tract
.
Inhalation of dust or fumes may cause chemical pneumonitis.
The effects may be delayed.
Medical observation is indicated.
Exposure may result in death.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact may cause skin sensitization.
Lungs may be affected by repeated or prolonged exposure
, resulting in chronic beryllium disease (cough, weight loss, weakness)
.
This substance is carcinogenic to humans.
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Physical
Properties
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Boiling point: 1160°C
Melting point: 555°C
Density: 1.99
g/cm3
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Solubility in water:
very good
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Environmental
Data
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The substance is very toxic to aquatic organisms.
The substance may cause long-term effects in the aquatic environment.
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N O T E S
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The symptoms of acute pneumonitis following a massive short-term exposure do not become manifest until 3 days.
Depending on the degree of exposure, periodic medical examination is suggested.
Do NOT take working clothes home.
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response.
Transport Emergency Card: TEC (R)-61GT5-II
Card has been partially updated in February 2009: see Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 1355
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BERYLLIUM 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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