Bertrandite

Formula
Be4(OH)2Si2O7
Description
Slabs.
Uses
Mineral source of beryllium.

Registry Numbers and Inventories.
CAS
12161-82-9
EC (EINECS/ELINCS)
235-299-9
RTECS
DS1225000
RTECS class
Tumorigen; Natural Product
UN (DOT)
1566
Beilstein/Gmelin
182194 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Korea ECL
Listed

Properties.
Formula
Be4H2O9Si2
Formula mass
238.24
Density
2.593 - 2.604 g/cm3
Refractive index
1.5914

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate personal protective clothing to prevent skin. Wear appropriate eye protection to prevent eye contact. Eyewash fountains should be provided in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection.
Respirators
Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive pressure-mode. 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 breathing apparatus operated in pressure-demand or other positive-pressure mode beryllium and beryllium compounds (as Be).
Small spills/leaks
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
No data.
Incompatibilities
Avoid contact with acids, caustics, chlorinated hydrocarbons, oxidizers, molten lithium.

Fire.
Fire fighting
Extinguish using agent most appropriate for surrounding fire.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
IDHL: NIOSH considers beryllium & beryllium compounds (as Be) to be a
Carcinogin
G-A1, I-1, N-1, CP65
Exposure effects
Fatigue, headache, and seizures may occur.
   Ingestion
Nausea, vomiting, and a metallic taste may be noted.
   Inhalation
Acute - irritation, pneumonitis, dyspnea, pulmonary edema.
   Skin
Acute - skin irritation, contact dermatitis
   Eyes
See Inhalation.

First aid
 
   Ingestion
Beryllium is thought to be poorly absorbed from the gut and usually presents no hazard if ingested. Some compounds may be irritating and dilution is recommended. Following ingestion and/or prior to gastric evacuation, immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 15 ml/kg in a child).
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Chronic granulomas are removed surgically.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
1566
Response guide
Hazard class
6.1
Packing Group
II; III