Material Safety Data Sheet
Hexamethyldisilane, 99%
Section 1 - Chemical Product and Company Identification
MSDS Name: Hexamethyldisilane, 99%
Company Identification: Chemcon Speciality Chemicals Pvt. Ltd.
D-34 Sardar Estate, Ajwa Road, Baroda - 390019
Tel : 0091 265 2512088 / 2511271
Fax : 0091 265 2571550
E Mail : expo@cscpl.com www.cscpl.com
Section 2 - Composition, Information on Ingredients
CAS# Chemical Name Percent EINECS/ELINCS
1450-14-2 Hexamethyldisilane 99% 215-911-0
Section 3 - Hazards Identification
EMERGENCY OVERVIEW
Appearance: colorless liquid. Flash Point: 11 deg C.
Warning! Flammable liquid and vapor. May cause eye and skin irritation. May cause
respiratory and digestive tract irritation. Hygroscopic (absorbs moisture from the air). The
toxicological properties of this material have not been fully investigated.
Target Organs: None.
Potential Health Effects
Eye: May cause eye irritation.
Skin: May cause skin irritation.
Ingestion: May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The
toxicological properties of this substance have not been fully investigated.
Inhalation: May cause respiratory tract irritation. The toxicological properties of this
substance have not been fully investigated. Vapors may cause dizziness or suffocation.
Chronic: No information found.
Section 4 - First Aid Measures
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper
and lower eyelids. Get medical aid.
Skin: Flush skin with plenty of water for at least 15 minutes while removing contaminated
clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before
reuse.
Ingestion: Never give anything by mouth to an unconscious person. Do NOT induce
vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give
artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other
symptoms appear.
Notes to Physician: Treat symptomatically and supportively.
Section 5 - Fire Fighting Measures
General Information: As in any fire, wear a self-contained breathing apparatus in pressure-
demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form
an explosive mixture with air. Will burn if involved in a fire. Use water spray to keep fire-
exposed containers cool. Containers may explode in the heat of a fire. Flammable liquid and
vapor.
Extinguishing Media: For small fires, use dry chemical, carbon dioxide, water spray or
alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use
water spray to cool fire-exposed containers. Water may be ineffective. Use agent most
appropriate to extinguish fire. Do NOT use straight streams of water.
Flash Point: 11 deg C ( 51.80 deg F)
Autoignition Temperature: Not available.
Explosion Limits, Lower:N/A
Upper: N/A
NFPA Rating: (estimated) Health: 1; Flammability: 2; Instability: 1
Section 6 - Accidental Release Measures
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks: Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in
suitable container. Clean up spills immediately, observing precautions in the Protective
Equipment section. Remove all sources of ignition. Use a spark-proof tool. A vapor
suppressing foam may be used to reduce vapors.
Section 7 - Handling and Storage
Handling: Wash thoroughly after handling. Use only in a well-ventilated area. Ground and
bond containers when transferring material. Use spark-proof tools and explosion proof
equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep
away from heat, sparks and flame. Do not pressurize, cut, weld, braze, solder, drill, grind, or
expose empty containers to heat, sparks or open flames.
Storage: Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store
in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible
substances. Flammables-area.
Section 8 - Exposure Controls, Personal Protection
Engineering Controls: Facilities storing or utilizing this material should be equipped with an
eyewash facility and a safety shower. Use adequate general or local exhaust ventilation to
keep airborne concentrations below the permissible exposure limits.
Exposure Limits
Chemical Name ACGIH NIOSH OSHA - Final PELs
6 mg/m3 TWA (listed
under Silica,
Hexamethyldisilane none listed none listed
amorphous).3000 mg/m3
IDLH (listed under Silica,
amorphous).
OSHA Vacated PELs: Hexamethyldisilane: No OSHA Vacated PELs are listed for this
chemical.
Personal Protective Equipment
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 a chemical apron. Wear appropriate protective clothing to prevent skin
exposure.
Respirators: Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece
airline respirator in the positive pressure mode with emergency escape provisions. Follow the
OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Always
use a NIOSH or European Standard EN 149 approved respirator when necessary.
Section 9 - Physical and Chemical Properties
Physical State: Liquid
Appearance: colorless
Odor: None reported.
pH: Not available.
Vapor Pressure: 30 mmHg @ 25 C
Vapor Density: Not available.
Evaporation Rate:Not available.
Viscosity: Not available.
Boiling Point: 112.0 - 114.0 deg C
Freezing/Melting Point:15 deg C
Decomposition Temperature:Not available.
Solubility: Not available.
Specific Gravity/Density:.7150g/cm3
Molecular Formula:C6H18Si2
Molecular Weight:146.38
Section 10 - Stability and Reactivity
Chemical Stability: Stable under normal temperatures and pressures.
Conditions to Avoid: Incompatible materials, ignition sources, excess heat, strong oxidants.
Incompatibilities with Other Materials: Strong oxidizing agents.
Hazardous Decomposition Products: Carbon monoxide, irritating and toxic fumes and
gases, carbon dioxide, silicon dioxide.
Hazardous Polymerization: Has not been reported.
Section 11 - Toxicological Information
CAS# 1450-14-2:
Oral, mouse: LD50 = >20 gm/kg;
Oral, rat: LD50 = >20 gm/kg;
Carcinogenicity:
CAS# 1450-14-2: Not listed by ACGIH, IARC, NTP, or CA Prop 65.
Epidemiology: No information available.
Teratogenicity: No evidence of teratogenicity (BDH Hazard Data Sheets 1990, Merck Ltd,
Dorset)
Reproductive Effects: No information available.
Mutagenicity: No evidence of mutagenicity (BDH Hazard Data Sheets 1990, Merck Ltd,
Dorset)
Neurotoxicity: No information available.
Other Studies:
Section 12 - Ecological Information
Ecotoxicity: No data available. No information available.
Environmental: Degradation studies : Compound can be hydroxylated by Mortierella
isabellina (Holland, H.L. J.Chem.Soc., Perkin Trans. 2 1990)
Physical: No information available.
Other: No information available.
Section 13 - Disposal Considerations
Chemical waste generators must determine whether a discarded chemical is classified as a
hazardous waste. US EPA guidelines for the classification determination are listed in 40 CFR
Parts 261.3. Additionally, waste generators must consult state and local hazardous waste
regulations to ensure complete and accurate classification.
RCRA P-Series: None listed.
RCRA U-Series: None listed.
Section 14 - Transport Information
US DOT Canada TDG
FLAMMABLE LIQUID NOS
Shipping Name: FLAMMABLE LIQUIDS, N.O.S.
(HEXAMETHYLDISILANE)
Hazard Class: 3 3
UN Number: UN1993 UN1993
Packing Group: II II
Additional Info: FP 11 C
Section 15 - Regulatory Information
US FEDERAL
TSCA
CAS# 1450-14-2 is listed on the TSCA inventory.
Health & Safety Reporting List
None of the chemicals are on the Health & Safety Reporting List.
Chemical Test Rules
None of the chemicals in this product are under a Chemical Test Rule.
Section 12b
None of the chemicals are listed under TSCA Section 12b.
TSCA Significant New Use Rule
None of the chemicals in this material have a SNUR under TSCA.
CERCLA Hazardous Substances and corresponding RQs
None of the chemicals in this material have an RQ.
SARA Section 302 Extremely Hazardous Substances
None of the chemicals in this product have a TPQ.
Section 313
No chemicals are reportable under Section 313.
Clean Air Act:
This material does not contain any hazardous air pollutants.
This material does not contain any Class 1 Ozone depletors.
This material does not contain any Class 2 Ozone depletors.
Clean Water Act:
None of the chemicals in this product are listed as Hazardous Substances under the CWA.
None of the chemicals in this product are listed as Priority Pollutants under the CWA.
None of the chemicals in this product are listed as Toxic Pollutants under the CWA.
OSHA:
None of the chemicals in this product are considered highly hazardous by OSHA.
STATE
CAS# 1450-14-2 can be found on the following state right to know lists: California, (listed
as Silica, amorphous), New Jersey, (listed as Silica, amorphous), Pennsylvania, (listed as
Silica, amorphous), Minnesota, (listed as Silica, amorphous), Massachusetts, (listed as Silica,
amorphous).
California Prop 65
California No Significant Risk Level: None of the chemicals in this product are listed.
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols:
F
Risk Phrases:
R 11 Highly flammable.
Safety Phrases:
S 16 Keep away from sources of ignition - No smoking.
S 33 Take precautionary measures against static discharges.
S 9 Keep container in a well-ventilated place.
WGK (Water Danger/Protection)
CAS# 1450-14-2: 1
Canada - DSL/NDSL
CAS# 1450-14-2 is listed on Canada's NDSL List.
Canada - WHMIS
This product does not have a WHMIS classification.
Canadian Ingredient Disclosure List
CAS# 1450-14-2 (listed as Silica, amorphous) is listed on the Canadian Ingredient
Disclosure List.
Section 16 - Additional Information
MSDS Creation Date: 12th May, 2005
The information above is believed to be accurate and represents the best information currently available to us. However, we
make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we
assume no liability resulting from its use. Users should make their own investigations to determine the suitability of the
information for their particular purposes. In no event shall Fisher be liable for any claims, losses, or damages of any third
party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if
Fisher has been advised of the possibility of such damages.
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