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When selecting a filtering device, a number of factors that can not be defined a priori and which can only be deduced from a correct and accurate risk analysis, must be considered.
The type of application, concentration, temperature, humidity, olfactory threshold, and individuality of the operator are just some of the aspects that contribute to the correct choice of the filter device.

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Substance Name	CAS Number	Formula	B.P.°C	Filter	Olfactory Threshold mg/m3	TLV mg/m3	TLV PPM	Physiological Action
bromotrifluoroethylene	598-73-2	C2BrF3	-2,5	AX	-	-	-	Toxic damage the kidneys, liver. Cause of nausea
chloropicrin	76-06-2	CCl3NO2	112	AP3	5,4	0,67	0,1	Irritating, tear gas. Gastric disorders, vomiting
Benzyl bromide	100-39-0	C7H7Br	198	A	-	-	-	Tear gas and toxic
chloroprene	126-99-8	C4H5Cl	59,4	AX	-	36	10	Toxic central nervous system
Ethyl bromide	74-96-4	C2H5Br	38,4	AX	890	22	5	Toxic narcotic. Causal conjunctivitis. Carcinogenic suspicion
Allyl chloride	107-05-1	C3H5Cl	44,6	AX	1,41	3	1	Mucous irritants, liver and kidney damage
Bromomethane	74-83-9	CH3Br	3,56	AX	80	9	1	Irritating nerve and vascular disorders
Ethyl methyl ketone	78-93-3	C4H8O	79,5	A	0,7375	590	200	Narcotic irritant
Benzyl chloride	100-44-7	C7H7Cl	179	A	0,235	5,2	1	It irritates the mucous membranes strongly carcinogenic
Isobutylene	115-11-7	C4H8	-6,9	AX	54,96	-	-	Toxic corrosive. Irritating the skin. Pulmonary edema
Cyanogen chloride	506-77-4	CNCl	13,1	B	2	0,75 C	0,3C	Loss and leukemia
Sulfur Chloride	10025-67-9	S2Cl2	138	BP3	-	5,5 c	1C	It irritates the mucous membranes of the eyes and the respiratory tract.
3-Chloro-1-propyne	624-65-7	C3H3Cl	31,6	AX	2000	20	5	Dizziness, anesthetic action, carcinogen
Cresol	1319-77-3	C7H8O	200	A	0,0012	22	5	Ulcerates skin, casus conjunctivitis
Chloroethane	75-00-3	C2H5Cl	12,3	AX	21	264	100	Drowsiness, apathy, visual disturbances, tremor
CS	-	-	-	ABEP3	-	-	-	lachrymatory
Methyl Chloride	74-87-3	CH3Cl	-23,7	***	-	103	50	Narcotic, it destroys eyes, liver, heart and central nervous system
DDT	50-29-3	C14H9Cl5	-	AP3	5,07	1	-	Action on the central nervous system
Methylene chloride	75-09-2	CH2Cl2	39,8	AX	540	174	50	It hurts the eyes, narcotic. Headache, nausea. Carcinogenic suspicion
Dichloroethane	75-34-3	C2H4Cl2	83,5	A	445	405	100	irritating irritating

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