Vinylidene chloride

  • 1,1-Dichloroethylene
  • 1,1-Dichloroethene
  • VDC
Formula
Cl2C=CH2
Structure
Description
Clear, colorless liquid, mild, sweet, chloroform-like odor.
Uses
Intermediate in the production of vinylidene polymer plasticsâ such as Saran (Dow).

Registry Numbers and Inventories.
CAS
75-35-4
EC (EINECS/ELINCS)
200-864-0
EC Index Number
602-025-00-8
EC Class
Extremely flammable; Harmful
R 12 19 20 68
S 7 16 29
RTECS
KV9275000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
1303
Merck
12,10134
Beilstein/Gmelin
1733365
Beilstein Reference
4-01-00-00706
RCRA
U078
EPA OPP
600033
Swiss Giftliste 1
G-1521
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H2Cl2
Formula mass
96.94
Melting point, °C
-122
Boiling point, °C
31.7
Vapor pressure, mmHg
600 (25 C)
Vapor density (air=1)
3.4
Saturation Concentration
66% (20 C)
Odor Threshold Odor threshold 1000 ppm
Critical temperature
220.8
Critical pressure
51.4
Density
1.21 g/cm3 (20 C)
Solubility in water
400 mg/L (20 C)
Viscosity
0.3302 cp at 20C
Surface tension
24 g/s2 @ 15 C (inhibited)
Refractive index
1.4249 (20 C)
Dipole moment
1.4 D
Dielectric constant
4.82 (20 C)
Partition coefficient, pKow
2.13
Thermal expansion
0.0013/K
Heat of fusion
65.2 kJ/mol
Heat of vaporization
26.5 kJ/mol
Heat of combustion
-1096 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Refrigerator (approx 4 C). Do not expose to air. Do not store in aluminum containers. Store under an inert atmosphere. Do not store in copper or copper alloy storage vessels.
B2 D1B F
Handling
Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Handle under an inert atmosphere. Store protected from air. This product may be under pressure; cool before opening. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. Place under an inert atmosphere. A vapor suppressing foam may be used to reduce vapors.
Disposal code
2
Stability
Peroxide formation may occur in containers that have been opened and remain in storage. May form explosive peroxides on contact with air or may undergo hazardous polymerization without an inhibitor.
Incompatibilities
Strong oxidizing agents, strong bases, aluminum, copper, copper alloys, oxygen, ozone, chlorosulfonic acid, oleum, aluminum alloys.
Decomposition
Hydrogen chloride, phosgene, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, formaldehyde, white polymeric powder.

Fire.
Flash Point,°C
-28
Autoignition, °C
570
Upper exp. limit, %
15.5
Lower exp. limit, %
6.5
Fire fighting
ear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. For large fires, use water spray, fog or alcohol resistant foam.
Fire potential
Extremely flammable liquid and vapor.
Hazards
Vapors are heavier than air and may travel to source of ignition and flash back.
Combustion products
Toxic hydrogen chloride and phosgene are generated in fires.
Health
4
 
Flammability
4
 
 
Reactivity
2
 

Health.
Exposure limit(s)
TLV: 5 ppm; 20 mg/m3 (STEL): 20 ppm; 79 mg/m3 (ACGIH 1992-1993). NIOSH REL: Ca See Appendix A
Poison_Class
1
Exposure effects
May cause liver and kidney damage. May cause reproductive and fetal effects. Animal inhalation studies have reported the development of tumors. Effects may be delayed. Chronic exposure may cause lung damage. Laboratory experiments have resulted in mutagenic effects.
   Ingestion
Harmful if swallowed. Possible aspiration hazard.
   Inhalation
May cause liver and kidney damage. Causes irritation of the mucous membrane and upper respiratory tract. Vinylidene chloride is highly volatile. Its odor is not adequate as a warning characteristic. Overexposure produces central nervous system depression. Central nervous system depression, with accompanying symptoms of inebriation that may have progressed to unconsciousness, has been observed in humans acutely exposed at concentrations of approximately 4000 ppm VDC. Complete recovery occurred if exposure was of short duration.
   Skin
Causes skin irritation. Prolonged or repeated skin contact may cause severe exacerbation. A single prolonged skin exposure is not likely to result in the material being absorbed in harmful amounts. Vinylidene chloride can be difficult to remove from belts, shoes, watchbands, and other leather items. Chemical burns may result if removal is not complete; therefore, contaminated leather goods should be destroyed.
   Eyes
Causes eye irritation. Vinylidene chloride is moderately irritating to the eyes. Contact can cause pain, irritation of the eyelids, iritis, and slight corneal injury. Permanent damage is unlikely.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1303
Response guide
Hazard class
3
Packing Group
I
 
USCG CHRIS Code
VCI
 
35 Vinyl halides
HS Code
2903 29 00
 
Std. Transport #
4907280
 
IMO Pollution Category
D
IMO Hazard code
S