Gas or Vapour to be Measured Chemical Formula	Réf tube	Gastec Tube No. & Name	Measuring Range (ppm)	No.of Pump Strokes	Shelf Life (year)	Note		TLV- TWA,C (ACGIH) (ppm)
Epichlorohydrin CH2OCHCH2Cl	163L	Ethylene oxide	1.2-120	2	1*	+T		2
1,2-Epoxypropane	See Propylene oxide
Ethanethiol	See Ethyl mercaptan
Ethanol C2H5OH	112	Ethanol	2.5-7.5%	1/2	3	T		1000
			0.05-2.5%	1
			0.01-0.05%	2
	112L	Ethanol	100-2000	1	3	T
			50-100	2
Ethyl alcohol	See Ethanol
Ethanolamine H2NCH2CH2OH	180L	Amines	1.95-39	1	2	T		3
Ethyl acetate CH3CO2C2H5	141	Ethyl acetate	0.1-1.5%	1	3	T		400
	141L	Ethyl acetate	25-800	2	2	T
Ethyl acrylate CH2:CHCO2C2H5	141L	Ethyl acetate	10-160	3	2	T		5
Ethylamine C2H5NH2	180	Amines	5-100	1	3	T		5
	180L	Amines	0.45-9	1	2	T
Ethyl benzene C6H5C2H5	122L	Toluene	1-70	2	3	-		100
p-Ethyl benzylchloride C6H4(C2H5)CH2Cl	131La	Vinyl chloride	2.5-50	2	2*	+		-
Ethyl chloroformate ClCO2C2H5	131La	Vinyl chloride	7-140	2	2*	+		-
Ethylene CH2:CH2	172	Ethylene	25-800	1	3	-		-
	172L	Ethylene	0.2-50	4	3	-
	103	Hydrocarbons (Lower Class)	8.4-16.8%	1/2	2	++
			0.1-8.4%	1
			0.35-0.7%	2
	171	Acetylene	0.1-2%	1	3	T
Ethylene chlorohydrin ClCH2CH2OH	111L	Methanol	20-200	3	3	T		C 1
Ethylenediamine H2NCH2CH2NH2	180	Amines	14-280	1	3	T		10
	180L	Amines	0.9-18	1	2	T
Ethylene dibromide BrCH2CH2Br	136H	Methyl bromide	14-210	1	3	+		2
	136L	Methyl bromide	8-80	1	2	+
Ethylene dichloride ClCH2CH2Cl	135	Methyl chloroform	400-2000	1	3	+T		10
	135L	Methyl chloroform	104-1040	1	2	+T
Ethylene glycol HOCH2CH2OH	165L	Ethylene glycol	10-100 mg/m3	2	3*	+		C 100 mg/m3
Ethylene glycol butyl ether CH3(CH2)3OCH2CH2OH	113L	Isopropyl alcohol	30-1000	2	3	T		20
Ethylene glycol ethyl ether C2H5OCH2CH2OH	113L	Isopropyl alcohol	62.5-1000	2	3	T		5
Ethylene glycol ethyl ether acetate CH3CO2CH2CH2OC2H5	113L	Isopropyl alcohol	6-96	3	3	T		5
Ethylene glycol methyl ether CH3OCH2CH2OH	113L	Isopropyl alcohol	15-900	2	3	T		5
Ethylene glycol methyl ether acetate	See Methoxyethyl acetate
Ethylene oxide C2H4O	163	Ethylene oxide	0.05-3%	1	3	-		1
	163L	Ethylene oxide	100-350	1	1*	+T
			1-100	2
			0.4-1	4
	163LL	Ethylene oxide	5-10	2	1*	+T
			0.1-5	4
Ethyl ether (C2H5)2O	161	Ethyl ether	0.04-1%	1	3	T		400
	161L	Ethyl ether	400-1200	1	2	T
			10-400	2
2-Ethyl hexyl alcohol CH3(CH2)3CH(CH(C2H5)CH2OH	117	Isoamyl alcohol	2-120	5	2	T		-
Ethylidene chloride	See 1,1-Dichloroethane
Ethyl mercaptan C2H5SH	72	Ethyl mercaptan	5-120	1	3	T		0.5
			0.5-5	2-10
	72L	Ethyl mercaptan	30-75	1/2	2	T
			0.5-30	1
			0.2-0.5	2
	70	Mercaptans	5-120	1	3	T
			0.5-5	2-10
	70L	Mercaptans	4-8	1/2	2	-
			0.5-4	1
			0.2-0.5	2
			0.1-0.5	4
	71H	Methyl mercaptan	100-3800	1	3	-
N-Ethyl morpholine C6H13NO	180	Amines	5-100	1	3	T		5
	180L	Amines	0.3-6	1	2	T

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