CDC - NIOSH Pocket Guide to Chemical Hazards - Beryllium & beryllium compounds (as Be)
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Beryllium & beryllium compounds (as Be)

Synonyms & Trade Names
Beryllium metal
CAS No.
7440-41-7 (metal)
RTECS No.
DS1750000 (metal)
DOT ID & Guide
1566 154(compounds)
1567 134(powder)
Formula
Be (metal)
Conversion
IDLH
Ca [4 mg/m3 (as Be)]
See: 7440417
Exposure Limits
NIOSH REL
Ca C 0.0005 mg/m3 See Appendix A
OSHA PEL
TWA 0.002 mg/m3
C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3
Measurement Methods
NIOSH 7102 , 7300 , 7301 , 7303 , 9102;
OSHA ID125G , ID206
See: NMAM or OSHA Methods
Physical Description
Metal: A hard, brittle, gray-white solid.
Molecular Weight
9.0
Boiling Point
4532°F
Melting Point
2349°F
Solubility
Insoluble
Vapor Pressure
0 mmHg (approx)
Ionization Potential
NA
Specific Gravity
1.85 (metal)
Flash Point
NA
Upper Exposive Limit
NA
Lower Explosive Limit
NA
Metal: Noncombustible Solid in bulk form, but a slight explosion hazard in the form of a powder or dust.
Incompatibilities & Reactivities
Acids, caustics, chlorinated hydrocarbons, oxidizers, molten lithium
Exposure Routes
inhalation, skin and/or eye contact
Symptoms
Berylliosis (chronic exposure): anorexia, weight loss, lassitude (weakness, exhaustion), chest pain, cough, clubbing of fingers, cyanosis, pulmonary insufficiency; irritation eyes; dermatitis; [potential occupational carcinogen]
Target Organs
Eyes, skin, respiratory system
Cancer Site
[lung cancer]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:Daily
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash
First Aid
(See procedures)
Eye:Irrigate immediately

Breathing:Fresh air
Respirator Recommendations

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0226   MEDICAL TESTS: 0025
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