VINYLIDENE CHLORIDE
Vinylidene chloride
CAS: 75-35-4
Molecular Formula: C2H2Cl2
VINYLIDENE CHLORIDE - Names and Identifiers
VINYLIDENE CHLORIDE - Physico-chemical Properties
| Molecular Formula | C2H2Cl2 |
| Molar Mass | 96.9433 |
| Density | 1.223g/cm3 |
| Melting Point | -122℃ |
| Boling Point | 31.6°C at 760 mmHg |
| Flash Point | −9 °F |
| Water Solubility | Soluble in water (2.5g/L at 20°C). |
| Vapor Presure | 601mmHg at 25°C |
| Vapor Density | 3.46 (vs air) |
| Appearance | Form Liquid, color Clear colorless |
| Storage Condition | Store at +2°C to +8°C. |
| Stability | Stable. Very flammable - note low flash point. Vapour may travel considerable distances to a source of ignition. Incompatible with strong oxidizing agents, alcohols, halides, sopper, aluminium. |
| Refractive Index | 1.432 |
| Physical and Chemical Properties | Chemical properties of vinylidene chloride is a colorless liquid with special smell, easy to gasify, B. p.31.7 ℃,n20D 1.4259, relative density 1.2130, almost insoluble in water, soluble in a variety of organic solvents. |
| Use | Mainly used for the preparation of synthetic fibers |
VINYLIDENE CHLORIDE - Risk and Safety
| Hazard Symbols | F+ - Highly flammable Xn - Harmful  |
| Risk Codes | R12 - Extremely Flammable R20 - Harmful by inhalation R40 - Limited evidence of a carcinogenic effect |
| Safety Description | S16 - Keep away from sources of ignition. S29 - Do not empty into drains. S7 - Keep container tightly closed. |
| UN IDs | UN 1303 3/PG 1 |
| WGK Germany | 3 |
| RTECS | KV9275000 |
| FLUKA BRAND F CODES | 1-8-10 |
| TSCA | Yes |
| HS Code | 2903 29 00 |
| Hazard Class | 3 |
| Packing Group | I |
| Toxicity | Acute oral LD50 for rats 1,550 mg/kg, male mice 194 mg/kg, female mice 217 mg/kg (Jones and Hathway, 1978):dogs 5,750 mg/kg (Tierney et al., 1979). Heitmuller et al. (1981) reported a NOEC of 80 ppm. |
VINYLIDENE CHLORIDE - Upstream Downstream Industry
VINYLIDENE CHLORIDE - Introduction
Open Data Unverified Data
Vinylidene chloride is an important organic compound commonly used in the production of polyvinyl chloride polymers. It possesses excellent properties such as oxidation resistance, heat resistance, and low permeability, making it widely used in applications such as packaging materials, coatings, inks, adhesives, and more. However, vinylidene chloride is toxic to humans and can pose hazards to the central nervous system and respiratory system. Therefore, it is important to observe proper safety precautions when handling this compound.
Properties:
- Vinylidene chloride is a colorless transparent liquid with relatively low melting and boiling points.
- It possesses excellent properties such as oxidation resistance, heat resistance, and low permeability, making it widely used in applications such as packaging materials, coatings, inks, adhesives, etc.
- Vinylidene chloride has low solubility in water and most organic solvents, but is compatible with many resins and plastics.
Uses:
- Mainly used in the production of polyvinyl chloride copolymers for applications such as packaging films, pipes, coatings, etc.
- Vinylidene chloride can also be used as an antioxidant, heat stabilizer, and barrier gas to enhance product performance.
Synthesis:
- Vinylidene chloride is typically produced by the reaction of chloroethylene with chlorine gas under UV light or heating conditions.
Safety:
- Vinylidene chloride is a toxic compound that can be harmful to the central nervous system and respiratory system.
- Precautions should be taken to avoid inhalation of vapors and skin contact, including the use of appropriate personal protective equipment such as respirators, goggles, and gloves.
- Operations should be carried out in well-ventilated areas, and contact with oxygen, strong oxidizing agents, and other hazardous substances should be avoided.
- Proper waste disposal procedures must be followed to prevent environmental contamination according to relevant regulations.
Last Update：2024-04-09 19:43:38
VINYLIDENE CHLORIDE - Uses and synthesis methods
use
Vinylidene chloride is 1, 1-dichloroethylene, which is an intermediate for the preparation of methyl dichlorochrysanthemum by the vinylidene chloride method. In addition to its own polymerization, the product can also form copolymers with vinyl chloride, acrylonitrile, butadiene, methacrylic acid, methyl methacrylate and other substances, and is used in the polymer industry and the film industry.
1, 1-dichloroethylene based (at least 80%) copolymer, can be prepared with refractory metachlor. 1, 1-dichloroethylene is copolymerized with acrylonitrile, butadiene, acrylate, styrene, etc., and various synthetic resins can be prepared. Vinylidene chloride resin can be processed into fibers or films, and can be used for surface coating of paper or plastic films. Polyvinylidene chloride fiber can be used to produce fabrics, tents, insect-proof nets, car cushions, etc. Polyvinylidene chloride film has less air permeability and moisture permeability than other plastic films, and is suitable for food packaging. With methacrylic acid, methyl methacrylate and other copolymers, can be used in the film industry.
Mainly used in the production of vinylidene chloride-vinyl chloride, vinylidene chloride-acrylonitrile and vinylidene chloride-acrylate copolymers
Mainly used to make synthetic fibers, etc.
production method
The industrial preparation method is obtained by the reaction of vinyl chloride and chlorine to first prepare 1,1, 2-trichloroethane, and then dehydrochlorination with 10% calcium hydroxide aqueous solution. Raw material consumption quota: vinyl chloride 730kg/t, chlorine 870kg/t, calcium hydroxide 750kg/t, trichloroethane 1500kg/t.
production method
The industrial preparation method is to prepare 1,1,2-trichloroethane by using iron filings as a catalyst at 80~90 ℃ with vinyl chloride and chlorine gas, and then treat trichloroethane with sodium hydroxide at 80~90 ℃ React, remove one molecule of hydrogen chloride to obtain crude vinylidene chloride, and then distill to obtain the finished product. Reaction equation: CH2 = CHCl[Cl2]& rarr;[FeCl3]CH2Cl-CHCl2[NaOH]& rarr;CH2 = CCl2
category
flammable liquids
toxicity classification
High toxicity
acute toxicity
oral-rat LD50: 200 mg/kg; oral-mouse LD50: 194 mg/kg
explosive hazard characteristics
Blowable with air
flammability hazard characteristics
It is flammable in case of open flame, high temperature, and oxidant; high heat decomposes toxic chloride gas
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored separately from oxidants and acids
fire extinguishing agent
Dry powder, dry sand, carbon dioxide, foam, mist water
occupational standards
TWA 20 mg/m3
Last Update：2024-04-10 22:29:15
VINYLIDENE CHLORIDE - Security information
| WGK Germany | 3 |
| RTECS number | KV9275000 |
| F | 1-8-10 |
| auto-ignition temperature | 968 °F |
| TSCA | Yes |
| customs code | 2903 29 00 |
| HazardClass | 3 |
| PackingGroup | I |
| toxic substance data | 75-35-4(Hazardous Substances Data) |
| Toxicity | Acute oral LD50 for rats 1,550 mg/kg, male mice 194 mg/kg, female mice 217 mg/kg (Jones and Hathway, 1978):dogs 5,750 mg/kg (Tierney et al., 1979). Heitmuller et al. (1981) reported a NOEC of 80 ppm. |
Last Update：2024-04-10 22:29:15
VINYLIDENE CHLORIDE - Nature
| vapor density | 3.46 (vs air) |
| Vapor pressure | 9.68 psi ( 20 °C) |
| refractive index | n20/D 1.426 |
| flash point | −9 °F |
| storage conditions | Store at +2°C to +8°C. |
| solubility | 2.5g/l |
| morphology | Liquid |
| color | Clear colorless |
| explosion limit value (explosive limit) | 8.4-16.5%(V) |
| water solubility | Soluble in water (2.5g/L at 20°C). |
| sensitivity | Light Sensitive |
| Merck | 14,9996 |
| BRN | 1733365 |
| Henry's Law Constant | 0.86, 1.00, 1.27, 1.97, and 2.66 at 2.0, 6.0, 10.0, 18.0, and 25.0 °C, respectively (EPICS-SPME, Dewulf et al., 1999) |
| exposure limit | TLV-TWA 5 ppm (~20 mg/m3) (ACGIH); TLV-STEL 20 ppm (ACGIH); carcinogenic ity: Animal Limited Evidence, Human Inad equate Evidence (IARC). |
| stability | Stable. Very flammable - note low flash point. Vapour may travel considerable distances to a source of ignition. Incompatible with strong oxidizing agents, alcohols, halides, sopper, aluminium. Rapidly absorbs oxygen from the air and forms explosive peroxides. Light and water promote self-polymerisation. May form explosive mix |
Last Update：2024-04-09 21:04:16
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Raw Materials for VINYLIDENE CHLORIDE
Downstream Products for VINYLIDENE CHLORIDE