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Chemical Datasheet
DICHLOROPHENYLTRICHLOROSILANE |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
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none
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NIOSH Pocket Guide |
International Chem Safety Card |
none
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none
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NFPA 704
data unavailable
General Description
Dichlorophenyltrichlorosilane is a straw colored liquid with a pungent odor. Material will burn though it may require some effort to ignite. It is decomposed by moisture or water to hydrochloric acid with evolution of heat. It is corrosive to metals and tissue. It is used as an intermediate for silicones.
Hazards
Reactivity Alerts
Air & Water Reactions
Dichlorophenyltrichlorosilane reacts vigorously with water to generate gaseous HCl. Based on a scenario where the chemical is spilled into an excess of water (at least 5 fold excess of water), half of the maximum theoretical yield of HYDROGEN cHLORIDE gas will be created in 1.4 minutes. Experimental details are in the following: "Development of the Table of Initial Isolation and Protective Distances for the 2008 Emergency Response Guidebook", ANL/DIS-09-2, D.F. Brown, H.M. Hartmann, W.A. Freeman, and W.D. Haney, Argonne National Laboratory, Argonne, Illinois, June 2009.
Fire Hazard
This material may burn but does not ignite readily. Flammable/poisonous gases may accumulate in tanks and hopper cars. This material may ignite combustibles (wood, paper, oil, etc.). The compound is a slight fire hazard when exposed to heat or flame. It is decomposed by moisture or water to hydrochloric acid with the evolution of heat. (EPA, 1998)
Health Hazard
Contact causes burns to skin and eyes. If inhaled, it may be harmful. Fire may produce irritating or poisonous gases. The compound is highly toxic by inhalation and is a strong irritant to the skin and eyes. (EPA, 1998)
Reactivity Profile
Chlorosilanes, such as DICHLOROPHENYLTRICHLOROSILANE, are compounds in which silicon is bonded to from one to four chlorine atoms with other bonds to hydrogen and/or alkyl groups. Chlorosilanes react with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride. They may also produce flammable gaseous H2. They can serve as chlorination agents. Chlorosilanes react vigorously with both organic and inorganic acids and with bases to generate toxic or flammable gases.
Belongs to the Following Reactive Group(s)
- Chlorosilanes
- Aryl Halides
Potentially Incompatible Absorbents
Use caution: Liquids with this reactive group classification have been
known to react with the
absorbents
listed below.
- Cellulose-Based Absorbents
- Mineral-Based & Clay-Based Absorbents
- Dirt/Earth
Response Recommendations
Isolation and Evacuation
Excerpt from 156
[Substances - Toxic and/or Corrosive (Combustible / Water-Sensitive)]:
IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
SPILL: See ERG Table 1 - Initial Isolation and Protective Action Distances on the UN/NA 1766 datasheet.
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2020)
Firefighting
Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Wear self-contained (positive pressure if available) breathing apparatus and full protective clothing. Move container from fire area if you can do so without risk. Spray cooling water on containers that are exposed to flames until well after fire is out. Do not use water on material itself. Use spray to absorb vapors.
This material may react violently with water. Extinguish with dry chemical, carbon dioxide, water spray, fog, or foam. Also dry sand may be used. (EPA, 1998)
Non-Fire Response
Excerpt from 156
[Substances - Toxic and/or Corrosive (Combustible / Water-Sensitive)]:
ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. A vapor-suppressing foam may be used to reduce vapors. FOR CHLOROSILANES, use AFFF alcohol-resistant medium-expansion foam to reduce vapors. DO NOT GET WATER on spilled substance or inside containers. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Prevent entry into waterways, sewers, basements or confined areas.
SMALL SPILL: Cover with DRY earth, DRY sand or other non-combustible material followed with plastic sheet to minimize spreading or contact with rain. Use clean, non-sparking tools to collect material and place it into loosely covered plastic containers for later disposal. (ERG, 2020)
Protective Clothing
For emergency situations, wear a positive pressure, pressure-demand, full facepiece self-contained breathing apparatus (SCBA) or pressure- demand supplied air respirator with escape SCBA and a fully-encapsulating, chemical resistant suit. (EPA, 1998)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Inhalation and skin are routes of entry.Move victim to fresh air; call emergency medical care. Remove and isolate contaminated clothing and shoes at the site. In case of contact with material, immediately flush skin or eyes with running water for at least 15 minutes. Keep victim quiet and maintain normal body temperature. (EPA, 1998)
Physical Properties
Flash Point:
286°F
(EPA, 1998)
Lower Explosive Limit (LEL):
Material will burn but requires some effort to ignite.
(EPA, 1998)
Upper Explosive Limit (UEL):
Material will burn but requires some effort to ignite.
(EPA, 1998)
Autoignition Temperature: data unavailable
Melting Point: data unavailable
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity:
1.562
(EPA, 1998)
- Denser than water; will sink
Boiling Point:
500°F
at 760 mmHg
(EPA, 1998)
Molecular Weight:
280.43
(EPA, 1998)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: data unavailable
AEGLs (Acute Exposure Guideline Levels)
Final AEGLs for Dichlorophenyltrichlorosilane (27137-85-5)
Exposure Period |
AEGL-1 |
AEGL-2 |
AEGL-3 |
10 minutes |
0.6 ppm |
33 ppm |
210 ppm |
30 minutes |
0.6 ppm |
14 ppm |
70 ppm |
60 minutes |
0.6 ppm |
7.3 ppm |
33 ppm |
4 hours |
0.6 ppm |
3.7 ppm |
8.7 ppm |
8 hours |
0.6 ppm |
3.7 ppm |
8.7 ppm |
(NAC/NRC, 2023)
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
Trichloro(dichlorophenyl) silane; (Dichlorophenyltrichlorosilane) (27137-85-5)
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0.6 ppm |
7.3 ppm |
33 ppm |
(DOE, 2018)
Regulatory Information
EPA Consolidated List of Lists
Regulatory Name |
CAS Number/ 313 Category Code |
EPCRA 302 EHS TPQ |
EPCRA 304 EHS RQ |
CERCLA RQ |
EPCRA 313 TRI |
RCRA Code |
CAA 112(r) RMP TQ |
Trichloro(dichlorophenyl)silane |
27137-85-5 |
500 pounds |
500 pounds |
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(EPA List of Lists, 2022)
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
Chemical Name |
CAS Number |
Threshold Quantity (TQ) |
Trichloro (dichlorophenyl) Silane |
27137-85-5 |
2500 pounds |
(OSHA, 2019)
Alternate Chemical Names
- DICHLORO PHENYL TRICHLORO SILANE
- (DICHLOROPHENYL)TRICHLOROSILANE
- DICHLOROPHENYLTRICHLOROSILANE
- SILANE,(DICHLOROPHENYL)TRICHLORO-
- TRICHLORO(DICHLOROPHENYL)SILANE