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Safety Data Sheet EN

Hexamethyldisilazane

CAS 999-97-3

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01

Identification

Product identifiers, regulatory numbers, and supplier information

Product Information

Product Name
Hexamethyldisilazane
Product Code
440191

Regulatory Identifiers

CAS Number
999-97-3 Check regulations →
REACH No.
A registration number is not available for this substance as the substance or its uses are exempted from registration, the annual tonnage does not require a registration or the registration is envisaged for a later registration deadline.

Identified Uses

Laboratory chemicals, Manufacture of substances

Manufacturers & Suppliers

S

Sigma-Aldrich BVBA/SPRL

manufacturer

Pegasuslaan 5, B-1831 DIEGEM

+32 (0)3 899-1301

Emergency Contacts

CHEMTREC

+(32) 28 083237

Anti-poison centre

070 245245

02

Hazard Identification

GHS classification, signal word, pictograms, and hazard statements

Classified danger

Hazard Classifications

Flam. Liq. Cat. 2 H225
Acute Tox. Cat. 4 H302
Acute Tox. Cat. 4 H332
Acute Tox. Cat. 3 H311
Aquatic Chronic Cat. 3 H412

GHS Pictograms

GHS02 - Flammable

GHS02

GHS06 - Acute toxicity

GHS06

Hazard Statements

H225 Highly flammable liquid and vapour.
H302 + H332 Harmful if swallowed or if inhaled
H311 Toxic in contact with skin.
H412 Harmful to aquatic life with long lasting effects.

Precautionary Statements

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P261 Avoid breathing dust/ fume/ gas/ mist/ vapours/ spray.
P273 Avoid release to the environment.
P280 Wear protective gloves/ protective clothing/ eye protection/ face protection.
IF ON SKIN: Wash with plenty of water. Call a POISON CENTER/doctor if you feel unwell.
IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTER/doctor if you feel unwell.

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03

Composition / Information on Ingredients

Chemical components, concentration ranges, and hazardous substance identification

Type substance
Chemical Name CAS Number Concentration Hazardous
1,1,1,3,3,3-Hexamethyldisilazane EC: 213-668-5 999-97-3 --- Yes
04

First Aid Measures

Emergency procedures for chemical exposure incidents

Inhalation

If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician.

Skin contact

Wash off with soap and plenty of water. Take victim immediately to hospital. Consult a physician.

Eye contact

Flush eyes with water as a precaution.

Ingestion

Do NOT induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

05

Firefighting Measures

Extinguishing media, specific hazards, and firefighter protection

Suitable media

Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.

Specific hazards

Flash back possible over considerable distance., Container explosion may occur under fire conditions.

Firefighter Protection

Wear self-contained breathing apparatus for firefighting if necessary.

06

Accidental Release Measures

Spill cleanup procedures, containment, and environmental protection

Emergency procedures

Wear respiratory protection. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Remove all sources of ignition. Evacuate personnel to safe areas. Beware of vapours accumulating to form explosive concentrations. Vapours can accumulate in low areas.

Environmental

Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided.

Cleanup methods

collect with an electrically protected vacuum cleaner or by wet-brushing and place in container for disposal according to local regulations (see section 13)

Related Products

Similar products with comparable safety profiles

07

Handling and Storage

Safe handling precautions, storage conditions, and workplace requirements

Handling

Avoid contact with skin and eyes. Avoid inhalation of vapour or mist. Keep away from sources of ignition - No smoking. Take measures to prevent the build up of electrostatic charge.

Storage

Store under nitrogen. Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage.

Fire prevention

Keep away from sources of ignition - No smoking. Take measures to prevent the build up of electrostatic charge.

08

Exposure Controls / PPE

Occupational exposure limits, engineering controls, and protective equipment

Hands

Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it. Full contact: Material: Nitrile rubber, Minimum layer thickness: 0.4 mm, Break through time: 480 min, Material tested: Camatril® (KCL 730 / Aldrich Z677442, Size M). Splash contact: Material: Nitrile rubber, Minimum layer thickness: 0.11 mm, Break through time: 30 min, Material tested: Dermatril® (KCL 740 / Aldrich Z677272, Size M). data source: KCL GmbH, D-36124 Eichenzell, phone +49 (0)6659 87300, e-mail sales@kcl.de, test method: EN374. If used in solution, or mixed with other substances, and under conditions which differ from EN 374, contact the supplier of the CE approved gloves. This recommendation is advisory only and must be evaluated by an industria situation of anticipated use by our customers. It should not be construed as offering an approval for any specific use scenario.

Eyes

Face shield and safety glasses. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

Respiratory

Where risk assessment shows air-purifying respirators are appropriate use (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineer protection, use a full-face supplied air respirator. Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).

Skin/Body

Complete suit protecting against chemicals. Flame retardant antistatic protective clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.

Environmental

Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided.

09

Physical and Chemical Properties

Appearance, physical state, melting point, boiling point, and material characteristics

Physical State
liquid
Physical State Data
liquid
State Under Standard Conditions
---
Appearance
Form: liquid, clear Colour: colourless
Colour
colourless
Colour Intensity
---
Form
liquid
Odor
No data available
Odor Threshold
No data available
Ph
> 7.0
Melting Point
Melting point/range: -76.19 °C at 1,013 hPa
Boiling Point
125 °C
Flash Point
11.4 °C - closed cup
Freezing Point
---
Softening Point
---
Solidification Point
---
Cloud Point
---
Crystallisation Point
---
Relative Evaporation Rate
---
Evaporation Rate
No data available
Vapor Pressure
1,900 Pa at 20 °C
Vapor Density
---
Relative Density
0.774 g/mL at 25 °C
Bulk Density
---
Density
---
Flammability
---
Upper Explosive Limit
16.3 % (V)
Lower Explosive Limit
0.8 % (V)
Explosive Limits
---
Auto Ignition Temperature
380.0 °C
Decomposition Temperature
---
Solubility
---
Partition Coefficient
log Pow: 2.62
Solubility In Water
insoluble
Solubility In Fat
---
Molecular Weight
---
Voc Content
---
Metal Corrosion
---
Dynamic Viscosity
---
Kinematic Viscosity
0.9 mm2/s at 20 °C
Properties Status
---
10

Stability and Reactivity

Chemical stability, hazardous reactions, and incompatible materials

Stability

Hydrolyses readily. Stable under recommended storage conditions.

Reactivity

No data available

Hazardous reactions

No data available

Avoid

Heat, flames and sparks.

Incompatible

Strong oxidizing agents, Strong acids

Decomposition

Hazardous decomposition products formed under fire conditions. - Carbon oxides, Nitrogen oxides (NOx), silicon oxides. Other decomposition products - No data available.

12

Ecological Information

Environmental toxicity, biodegradation, and bioaccumulation data

The data for this section has not been processed yet.

13

Disposal Considerations

Waste treatment methods, disposal recommendations, and waste codes

The data for this section has not been processed yet.

14

Transport Information

UN numbers, shipping names, transport classes, and regulatory requirements

UN Number
1992
Shipping Name
FLAMMABLE LIQUID, TOXIC, N.O.S. (1,1,1,3,3,3-Hexamethyldisilazane)
Transport Class
3 (6.1)
Packing Group
II
15

Regulatory Information

Chemical regulations, safety assessments, and compliance status

The data for this section has not been processed yet.

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Frequently Asked Questions

Common questions about safety, handling, and properties

What is the hazard signal word for Hexamethyldisilazane?

The signal word is danger.

What is the physical form of Hexamethyldisilazane?

Hexamethyldisilazane is a liquid appearing as form: liquid, clear colour: colourless with colourless color. It has no data available odor.

What is Hexamethyldisilazane used for?

Laboratory chemicals, Manufacture of substances

What are the hazard statements for Hexamethyldisilazane?

This substance has 4 hazard statements:

  • H225: Highly flammable liquid and vapour.
  • H302 + H332: Harmful if swallowed or if inhaled
  • H311: Toxic in contact with skin.
  • H412: Harmful to aquatic life with long lasting effects.

What is the melting point of Hexamethyldisilazane?

The melting point is Melting point/range: -76.19 °C at 1,013 hPa and the boiling point is 125 °C.