SIGMA-ALDRICH
Material Safety Data Sheet
Date Printed: 09/AUG/2005
Date Updated: 25/JAN/2005
Version 1.5
According to 91/155/EEC
Classified as Hazardous according to the criteria of EU Annex 1 and
NOHSC.
1 - Product and Company Information
Product Name HEXAMETHYLDISILOXANE, 98+%
Product Number 205389
Company Sigma-Aldrich Pty. Ltd.
12 Anella Avenue
Castle Hill NSW 2154
Technical Phone # +61 2 9841 0555 (1800 800 097)
Fax +61 2 9841 0500 (1800 800 096)
Emergency Phone # +44 8701906777 (1800 448 465)
2 - Composition/Information on Ingredients
Product Name CAS # EC no Annex I
Index Number
HEXAMETHYLDISILOXANE 107-46-0 203-492-7 None
Formula C6H18OSi2
Molecular Weight 162.38 AMU
Synonyms Belsil DM 0.65 * Bis(trimethylsilyl)ether *
Bis(trimethylsilyl)oxide * Hexamethyldisiloxane
* KF 96L * LS-7130 * OS 10 *
Oxybis(trimethylsilane) * Silane,
oxybis(trimethyl- * SWS-F 221
3 - Hazards Identification
SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT
Highly flammable.
4 - First Aid Measures
AFTER INHALATION
If inhaled, remove to fresh air. If not breathing give
artificial respiration. If breathing is difficult, give oxygen.
AFTER SKIN CONTACT
In case of contact, immediately wash skin with soap and copious
amounts of water.
AFTER EYE CONTACT
In case of contact, immediately flush eyes with copious amounts
of water for at least 15 minutes.
AFTER INGESTION
If swallowed, wash out mouth with water provided person is
conscious. Call a physician.
5 - Fire Fighting Measures
CONDITIONS OF FLAMMABILITY
Under fire conditions, material may decompose to form flammable
and/or explosive mixtures in air.
EXTINGUISHING MEDIA
Suitable: Water spray. Carbon dioxide, dry chemical powder, or
appropriate foam.
SPECIAL RISKS
Specific Hazard(s): Flammable liquid. Emits toxic fumes under
fire conditions.
Explosion Hazards: Vapor may travel considerable distance to
source of ignition and flash back. Container explosion may occur
under fire conditions.
SPECIAL PROTECTIVE EQUIPMENT FOR FIREFIGHTERS
Wear self-contained breathing apparatus and protective clothing
to prevent contact with skin and eyes.
6 - Accidental Release Measures
PERSONAL PRECAUTION PROCEDURES TO BE FOLLOWED IN CASE OF LEAK OR SPILL
Evacuate area. Shut off all sources of ignition. Use nonsparking
tools.
PROCEDURE(S) OF PERSONAL PRECAUTION(S)
Wear self-contained breathing apparatus, rubber boots, and heavy
rubber gloves.
METHODS FOR CLEANING UP
Cover with dry-lime, sand, or soda ash. Place in covered
containers using non-sparking tools and transport outdoors.
Ventilate area and wash spill site after material pickup is
complete.
7 - Handling and Storage
HANDLING
Directions for Safe Handling: Do not breathe vapor. Do not get
in eyes, on skin, on clothing. Avoid prolonged or repeated
exposure.
STORAGE
Conditions of Storage: Keep tightly closed. Keep away from heat,
sparks, and open flame.
Incompatible Materials: Oxygen
SPECIAL REQUIREMENTS: Store under inert gas. Hygroscopic.
8 - Exposure Controls / Personal Protection
ENGINEERING CONTROLS
Safety shower and eye bath. Use nonsparking tools. Mechanical
exhaust required.
GENERAL HYGIENE MEASURES
Remove and wash contaminated clothing promptly. Wash thoroughly
after handling.
PERSONAL PROTECTIVE EQUIPMENT
ALDRICH - 205389 www.sigma-aldrich.com Page 2
Respiratory Protection: Government approved respirator.
Hand Protection: Compatible chemical-resistant gloves.
Eye Protection: Chemical safety goggles.
9 - Physical and Chemical Properties
Appearance Physical State: Liquid
Color: Colorless
Property Value At Temperature or Pressure
pH N/A
BP/BP Range 101 藲C 760 mmHg
MP/MP Range -59 藲C
Flash Point 0.6 藲C Method: closed cup
Flammability N/A
Autoignition Temp 340 藲C
Oxidizing Properties N/A
Explosive Properties N/A
Explosion Limits Lower: 0.5 %
Upper: 21.8 %
Vapor Pressure 20 hPa 20 藲C
SG/Density 0.764 g/cm3
Partition Coefficient Log Kow: 3.1 25 藲C
Viscosity < 0.001 Pas 25 藲C
Vapor Density > 1 g/l
Saturated Vapor Conc. N/A
Evaporation Rate N/A
Bulk Density N/A
Decomposition Temp. N/A
Solvent Content N/A
Water Content N/A
Surface Tension N/A
Conductivity N/A
Miscellaneous Data N/A
Solubility N/A
10 - Stability and Reactivity
STABILITY
Stable: Stable.
Conditions of Instability: May decompose on exposure to moist air
or water.
Conditions to Avoid: When heated to temperatures above 150藲C in
the presence of air, product can form formaldehyde vapors.
Formaldehyde is a potential cancer hazard; a known skin and
respiratory sensitizer and an irritant to the eyes, nose, throat,
skin, and digestive tract.
Materials to Avoid: Strong acids, Strong bases, Strong oxidizing
agents, Oxygen.
HAZARDOUS DECOMPOSITION PRODUCTS
Hazardous Decomposition Products: Carbon monoxide, Carbon dioxide,
Silicon oxide.
HAZARDOUS POLYMERIZATION
Hazardous Polymerization: Will not occur
11 - Toxicological Information
RTECS NUMBER: JM9237000
ALDRICH - 205389 www.sigma-aldrich.com Page 3
ACUTE TOXICITY
LD50
Oral
Rat
> 5,000 mg/kg
LD50
Skin
Rabbit
> 5,000 mg/kg
LC50
Inhalation
Rat
106,000 mg/m3
4H
LC50
Inhalation
Rat
15,956 ppm
4H
Remarks: Behavioral:Somnolence (general depressed activity).
Behavioral:Convulsions or effect on seizure threshold.
Behavioral:Ataxia.
LD50
Intraperitoneal
Mouse
4500 MG/KG
LD50
Skin
Rabbit
16 ML/KG
Remarks: Peripheral Nerve and Sensation:Flaccid paralysis with
appropriate anesthesia. Behavioral:Altered sleep time (including
change in righting reflex). Behavioral:Somnolence (general
depressed activity).
IRRITATION DATA
Skin
Rabbit
500 mg
24H
Remarks: Mild irritation effect
Eyes
Rabbit
0.1 ml
24H
Remarks: Mild irritation effect
SIGNS AND SYMPTOMS OF EXPOSURE
Prolonged or repeated exposure to skin causes defatting and
dermatitis. Exposure can cause: Dizziness. To the best of our
knowledge, the chemical, physical, and toxicological properties
have not been thoroughly investigated.
ROUTE OF EXPOSURE
Skin Contact: May cause skin irritation.
Skin Absorption: May be harmful if absorbed through the skin.
Eye Contact: May cause eye irritation.
ALDRICH - 205389 www.sigma-aldrich.com Page 4
Inhalation: May be harmful if inhaled. Material may be
irritating to mucous membranes and upper respiratory tract.
Ingestion: May be harmful if swallowed.
TARGET ORGAN INFORMATION
Nerves.
CHRONIC EXPOSURE - MUTAGEN
Mutation test: Histidine reversion (Ames)
12 - Ecological Information
No data available.
13 - Disposal Considerations
SUBSTANCE DISPOSAL
Contact a licensed professional waste disposal service to dispose
of this material. Burn in a chemical incinerator equipped with an
afterburner and scrubber but exert extra care in igniting as this
material is highly flammable. Observe all federal, state, and
local environmental regulations.
14 - Transport Information
RID/ADR
UN#: 1993
Class: 3
PG: II
Proper Shipping Name: Flammable liquid, n.o.s.
IMDG
UN#: 1993
Class: 3
PG: II
Proper Shipping Name: Flammable liquid, n.o.s.
Marine Pollutant: No
Severe Marine Pollutant: No
Technical Name: Required
IATA
UN#: 1993
Class: 3
PG: II
Proper Shipping Name: Flammable liquid, n.o.s.
Inhalation Packing Group I: No
Technical Name: Required
15 - Regulatory Information
CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES
INDICATION OF DANGER: F
Highly Flammable.
R-PHRASES: 11
Highly flammable.
S-PHRASES: 16
Keep away from sources of ignition - no smoking.
COUNTRY SPECIFIC INFORMATION
Germany
WGK: 1
ALDRICH - 205389 www.sigma-aldrich.com Page 5
SWITZERLAND
SWISS POISON CLASS: FREI
16 - Other Information
WARRANTY
The above information is believed to be correct but does not
purport to be all inclusive and shall be used only as a guide. The
information in this document is based on the present state of our
knowledge and is applicable to the product with regard to
appropriate safety precautions. It does not represent any
guarantee of the properties of the product. Sigma-Aldrich Inc.,
shall not be held liable for any damage resulting from handling or
from contact with the above product. See reverse side of invoice
or packing slip for additional terms and conditions of sale.
Copyright 2005 Sigma-Aldrich Co. License granted to make unlimited
paper copies for internal use only.
DISCLAIMER
For R&D use only. Not for drug, household or other uses.
ALDRICH - 205389 www.sigma-aldrich.com Page 6
|