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Butane (n-Butane)
Formula
C4H10

CAS nr.
106-97-8

Measuring ranges
Standard range: 
0 - 500 ppm
High range:0 - 100% LEL

TLV level (TLV-TWA)
1000 ppm 

Risks
Risk of oxygen deficiency. Minimum oxygen content 19.5% by volume under normal atmospheric pressure.
Risk of explosion. LEL = 1.3 %

Relative density (compared to air):
2.01 

Bionics Instrument Toxic Gas code
TG-2300 (%LEL detection)
TG-5300 (ppm detection)
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