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)
Vinyl acetate CH3CO2CH:CH2	143	Vinyl acetate	100-250	1	3	+		10
			10-100	2
			5-10	4
	141	Ethyl acetate	0.02-0.9%	1	3	T
Vinyl benzene	See Styrene
Vinyl chloride CH2:CHCl	131	Vinyl chloride	1-2%	1/2	3	-		1
			0.05-1%	1
			0.025-0.05%	2
	131La	Vinyl chloride	20-54	1/2	2*	+
			1-20	1
			0.5-1	2
			0.25-0.5	4
	131L	Vinyl chloride	3-6.6	1	2*	+T
			0.2-3	2
			0.1-0.2	4
	131LB	Vinyl chloride	20-70	1	3	T
			1-20	2
			0.25-1	4
Vinyl cyanide	See Acrylonitrile
Vinylidene chloride CH2:CCl2	130L	Vinylidene chloride	14-40.6	1/2	2*	+		5
			1-14	1
			0.4-1	2
Vinyl trimethoxysilane CH2:CHSi(OCH3)3	113L	Isopropyl alcohol	2.5-40	2	2	T		-

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