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Chemical Identifying Information for Vinyl Chloride
CAS NUMBER: 75-01-4
SYNONYMS:
Chloroethylene
Chloroethene
NIOSH Registry Number: KU9625000
CHEMICAL FORMULA: C2H3Cl
MOLECULAR WEIGHT: 62.5
WLN: G1U1
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SPECIFIC GRAVITY: 0.9106 @ 20/4 C
DENSITY: Not available
MELTING POINT: -154 C
BOILING POINT: -13.9 C
SOLUBILITY: Water: Slightly soluble
95% Ethanol: Soluble
Ether: Very soluble
HAP WEIGHTING FACTOR: 10 [713]
FIRE HAZARD: Vinyl chloride has a flash point of -110 F (oc). Fires involving vinyl chloride should be extinguished with carbon dioxide, foam and/or dry chemical.
LEL: Not available UEL: Not available
REACTIVITY: Vinyl chloride can react with oxidizing agents and many other organic compounds.
STABILITY: Vinyl chloride should be protected from light and heat.
USES: Vinyl chloride is used in the plastics industry, as refrigerant, and as an intermediate in organic synthesis.
COMMENTS: Vinyl chloride can present a severe explosion risk at 30,000 ppm. Use in aerosol sprays is prohibited. Large fires of this material are practically inextinguishable.
ACUTE/CHRONIC HAZARDS: Vinyl chloride may be toxic and an irritant.
SYMPTOMS: Symptoms of exposure may include systemic disorder; inhalation of high concentration of gas may cause narcosis (paralysis) and may be fatal. Other symptoms may include conjunctivitis and corneal burns, dermatitis, headache, and dizziness.
Numbers in brackets [ ] are reference numbers in the source of this information.
Source: Instant EPA's Air Toxics, Copyright 1994 by Instant Reference Sources, Inc. and Digital Liaisons, Austin, Texas
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EPA's IRIS is the world's most comprehensive toxicology database. Chemical entries often range from 20 to 50 pages of information. The information below represents a small selection of the data involving carcinogenicity in Section II of IRIS. Many of the technical terms are hyperlinked with explanations in Instant EPA's IRIS from which the following exerpts were taken but space limitations preclude that convenience here.
Vinyl Chloride is on EPA's list of future compounds which will be added to IRIS in the near future. When it is added, we'll place selected information involving it's carcinogenicity and other toxicological properties in this file for you. If you want to see a list of all of the compounds in EPA's IRIS, go to the Instant Reference Sources home page and select the reference named Instant EPA's IRIS.
Source: Instant EPA's IRIS, Copyright 1996 by Instant Reference Sources, Inc. and Digital Liaisons, Austin, Texas
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The table below was scanned from Instant Gloves + CPC Database. It contains information on the breakthrough times and permeation rates for Vinyl Chloride tested against many manufacturer's models of CPC. If you are not familiar with the chemical permeation test procedures and the interpretation of breakthrough time and permeation rate data then you will find the Permeation Index Number to be useful in helping you make selections.
The Permeation Index Number Appears in the fourth column from the left in the table of data below. It's interpretation with the data in the table is:
Index Number .... Level of Permeation Rate
0 .... None or Very Low - - this is the Best Selection.
1 .... Very Low - - this is the Next Best Selection.
2 .... Low - - Sometimes Satisfactory but change garment when exposed.
3 .... Moderate Poor Choice - - Change the garment quickly when exposed.
4 .... High - - Very Poor Choice; Splashes Only, Change Quickly When Exposed.
5 .... Very High - - Dangerous Choice
Additional Information on Permeation Index Numbers
Numbers in the last column are reference numbers in the source of this information.
Source: Instant Gloves + CPC Database, Copyright 1996 by Instant Reference Sources, Inc. and Digital Liaisons, Austin, Texas
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Method TO-1 is used to collect and determine volatile, non-polar organics (aromatic hydrocarbons, chlorinated hydrocarbons) that can be captured on Tenax ® and determined by thermal desorption techniques. The compounds to be determined by this technique have boiling points in the range of 80-200°C.
2.0 SUMMARY OF METHOD
Air is drawn through a cartridge containing 1-2 g of Tenax ®. The cartridge is analyzed in the laboratory and purged with an inert gas into first a gas chromatograph (GC) followed by a mass spectrometer (MS). Only capillary GC techniques should be used. The GC temperature is increased through a temperature program and the compounds are eluted from the column on the basis of boiling points. The MS identifies and quantifies the compounds by mass fragmentation patterns. Compound identification is normally accomplished using a library search routine on the basis of GC retention time and mass spectral characteristics.
3.0 INTERFERENCES
The most common interferences are structural isomers.
REFERENCE
Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air. U.S. Environmental Protection Agency. EPA-600/4-89-017 (Supplements: 600/4-87-006, 600/4-87-013).
1.0 SCOPE AND APPLICATION
Method TO-14 is used to determine semi-volatile and volatile organic compounds in ambient air. The sample canisters can be placed above or below atmospheric pressure. Pressurized samples can be detected at the ppbv level.
2.0 SUMMARY OF METHOD
Air is drawn through a sampling train into a pre-evacuated sample SUMMA ® canister. The canister is attached to the analytical system. Water vapor is reduced in the gas stream by a Nafion dryer and VOCs are concentrated by collection into a cryogenically-cooled trap. The cryogen is removed and the temperature of the sample raised to volatilize the sample into a high resolution gas chromatogrph (HRGC). The GC temperature is increased through a temperature program and the compounds are eluted from the column on the basis of boiling points into a detector. The choice of detector depends on the specificity and sensitivity required by the analysis. Non-specific detectors include nitrogen-phosphorus detectors, flame ionization detectors, electron capture detectors, and photoionization detectors. Specific detectors include a mass spectrometer (MS) operating in the selected ion mode or the SCAN mode, or an ion trap detector. Identification errors can be reduced by employing simultaneous detection by different detectors.
3.0 INTERFERENCES
Interferences can occur because of moisture contamination in the dryer. Polar organic compounds may be lost with moisture removed in the GC/MS dryer.
REFERENCE
Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air. U.S. Environmental Protection Agency. EPA-600/4-89-017 (Supplements: 600/4-87-006, 600/4-87-013).
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