Page:NIOSH Manual of Analytical Methods - 3800.pdf/8

ORGANIC AND INORGANIC GASES by FTIR Spectrometry: METHOD 3800, Issue 1, dated 15 March 2003—Page 8 of 47

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Compound /Synonyms	CAS# RTECS	Empirical or Molecular Formula	MW[t1 1]	BP[t1 2] (°C)	VP[t1 3] @ 25°C (mmHg)	Exposure Limits (ppm) [t1 4],[t1 5],[t1 6] (ACGIH[t1 7]/ NIOSH[t1 8] / OSHA)
Tetrafluroetheylene /TFE	116-14-3	${\ce {F2C=CF2}}$	100	-76	>2000	5[t1 9]
Aldehydes
Formaldehyde	50-00-0 LP8925000	${\ce {H2CO}}$	30	-21	gas	0.3–Ceiling / Ca[t1 7]
Epxoides
Ethylene Oxide	72-21-8 KX2450000	${\ce {C2H40}}$	44	10.5	gas	1/5–Ceiling
Ethers
Tetrahydofuran	109-99-9 LU5950000	${\ce {C4H8O}}$	72.1	66	165	200 / 200/200
Inorganic Compounds
Nitrous Oxide	10024-97-2 QX1350000	${\ce {N2O}}$	44	-53	>2000	50 / 25
Carbon Disulfide	75-15-0 FF6650000	${\ce {CS2}}$	76.1	116	297	10/1/20
Sulfur Dioxide	7446-09-5	${\ce {SO2}}$	64.1	-10	gas	2/2/2
Ammonia	7664-41-7 BO0875000	${\ce {NH3}}$	17.0	-28	gas	25/25/50
Inorganic Acids
Hydrogen Fluoride	7664-39-3 MW7875000	${\ce {HF}}$	20.0	20	783	3/3/3
Molecular Weight (Obtained from References 12–14) Boiling Point (Obtained from References 12–14) Vapor Pressure (Obtained from References 12–14) Exposure limit as an 8-hour TWA (Time Weighted Average) in ppm (parts per million), by volume. Ceiling values denoted as "Ceiling" following limit. Ca–NIOSH listed carcinogen (See Appendix A of Reference 12) NA–TLV for this chemical not published (See Reference 13) Published 1998 ACGIH TLV (See Reference 13) Published NIOSH REL–(See Reference 13) Manufacturer’s Recommended Exposure Limit

NIOSH Manual of Analytical Methods, Fourth Edition