Chlorotrimethylsilane

Guidance on Safe Use

First-aid measures

EYES: Remove contact lenses, if present. Wash immediately with plenty of water for at least 30-60 minutes, opening the eyelids fully. Get medical advice/attention.

SKIN: Remove contaminated clothing. Rinse skin with a shower immediately. Get medical advice/attention.

INGESTION: Have the subject drink as much water as possible. Get medical advice/attention. Do not induce vomiting unless explicitly authorised by a doctor.

INHALATION: Get medical advice/attention immediately. Remove victim to fresh air, away from the accident scene. If the subject stops breathing, administer artificial respiration. Take suitable precautions for rescue workers.

Fire-fighting measures

Extinguishing media

SUITABLE EXTINGUISHING EQUIPMENT

Extinguishing substances are: carbon dioxide, foam, chemical powder. For product loss or leakage that has not caught fire, water spray can be used to disperse flammable vapours and protect those trying to stem the leak.

UNSUITABLE EXTINGUISHING EQUIPMENT

Do not use jets of water. Water is not effective for putting out fires but can be used to cool containers exposed to flames to prevent explosions.

Dry powder, foam or dry sand.

Special hazards arising from the substance or mixture

HAZARDS CAUSED BY EXPOSURE IN THE EVENT OF FIRE

Excess pressure may form in containers exposed to fire at a risk of explosion. Do not breathe combustion products.

Do not use Water. Spray water only to cool closed containers.

In case of fire, carbon monoxide, carbon dioxide, hydrochloric acid, SiO2 can be released.

Advice for firefighters

GENERAL INFORMATION

Use jets of water to cool the containers to prevent product decomposition and the development of substances potentially hazardous for health. Always wear full fire prevention gear. Collect extinguishing water to prevent it from draining into the sewer system. Dispose of contaminated water used for extinction and the remains of the fire according to applicable regulations.

SPECIAL PROTECTIVE EQUIPMENT FOR FIRE-FIGHTERS

Normal fire fighting clothing i.e. fire kit (BS EN 469), gloves (BS EN 659) and boots (HO specification A29 and A30) in combination with self-contained open circuit positive pressure compressed air breathing apparatus (BS EN 137).

The water hydrolyzes the product releasing an acid gas which, in contact with metal surfaces, can generate highly flammable and / or explosive gaseous hydrogen.

Use a self-contained respirator, wear full protective suits.

Accidental release measures

Personal precautions, protective equipment and emergency procedures

Stop the leak if there is no danger. Wear a self-contained breathing apparatus and protective clothing. Assess the need to evacuate or isolate the area according to the local emergency plan. Eliminate all possible sources of ignition.

Send away individuals who are not suitably equipped. Use explosion-proof equipment. Eliminate all sources of ignition (cigarettes, flames, sparks, etc.) from the leakage site.

Environmental precautions

Prevent the product from entering sewers, surface water or groundwater.

Methods and material for containment and cleaning up

Aspirate the leaked product into a suitable container. Absorb the remainder with inert absorbent material. Provide sufficient ventilation, do not flush with water or liquid detergents. Remove all ignition sources.

Handling and storage

Protect from moisture and water, store under dry inert gas.

Precautions for safe handling

Ensure that there is an adequate earthing system for the equipment and personnel. Avoid contact with eyes and skin. Do not breathe powders, vapours or mists. Do not eat, drink or smoke during use. Wash hands after use. Avoid leakage of the product into the environment.

Keep away from heat, sparks and naked flames; do not smoke or use matches or lighters. Without adequate ventilation, vapours may accumulate at ground level and, if ignited, catch fire even at a distance, with the danger of backfire. Avoid bunching of electrostatic charges.

In order to avoid the risk of fires and explosions, never use compressed air when handling. Open containers with caution as they may be pressurised.

Treat under dried protection gas. Use accurate ventilation / aspiration in the workplace. Take measures against electrostatic charges. Vapors combined with air can form an explosive mixture.

Conditions for safe storage, including any incompatibilities

Store only in the original container. Store in a ventilated and dry place, far away from sources of ignition. Keep containers well sealed. Keep the product in clearly labelled containers. Avoid overheating. Avoid violent blows.

Store in a well ventilated place, keep far away from sources of heat, naked flames and sparks and other sources of ignition.

Keep the containers tightly closed. Store in a cool and dry place. Do not store in contact with water and oxidizing agents.

Transport information

Land transport (UN RTDG/ADR/RID)

UN number:

1298

Shipping

SpecialProvisions

Inland waterway transport (UN RTDG/ADN(R))

UN number:

1298

Shipping

Remarks

Marine transport (UN RTDG/IMDG)

UN number:

1298

Shipping information

Proper shipping name and description:

TRIMETHYLCHLOROSILANE

Chemical name:

TRIMETHYLCHLOROSILANE

Remarks

Air transport (UN RTDG/ICAO/IATA)

UN number:

1298

Shipping information

Proper shipping name and description:

TRIMETHYLCHLOROSILANE

Chemical name:

TRIMETHYLCHLOROSILANE

Remarks

SpecialProvisions

Exposure controls / personal protection

Control parameters

CHLOROTRIMETHYLSILANE

Predicted no-effect concentration - PNEC

Normal value in fresh water 0,25 mg/l

Normal value in marine water 0,025 mg/l

Normal value for fresh water sediment 2 mg/kg/d

Normal value for marine water sediment 0,2 mg/kg/d

Normal value for water, intermittent release 2,5 mg/l

Normal value of STP microorganisms 67 mg/l

Normal value for the terrestrial compartment 0,25 mg/kg/d

Health - Derived no-effect level - DNEL / DMEL

Effects on consumers Effects on workers

Route of exposure

Inhalation

Acute local 24 mg/m3

Acute systemic 89  mg/m3

Chronic local 24  mg/m3

Chronic systemic 89 mg/m3

Skin  

Acute systemic 13 mg/kg bw/d

Chronic systemic13 mg/kg bw/d

VND = hazard identified but no DNEL/PNEC available ; NEA = no exposure expected ; NPI = no hazard identified.

Exposure controls

As the use of adequate technical equipment must always take priority over personal protective equipment, make sure that the workplace is well aired through effective local aspiration.

When choosing personal protective equipment, ask your chemical substance supplier for advice.

Personal protective equipment must be CE marked, showing that it complies with applicable standards.

Provide an emergency shower with face and eye wash station.

HAND PROTECTION

Protect hands with category III work gloves (see standard EN 374).The following should be considered when choosing work glove material: compatibility, degradation, failure time and permeability.

The work gloves' resistance to chemical agents should be checked before use, as it can be unpredictable. The gloves' wear time depends on the duration and type of use.

SKIN PROTECTION

Wear category III professional long-sleeved overalls and safety footwear (see Directive 89/686/EEC and standard EN ISO 20344). Wash body with soap and water after removing protective clothing.

Consider the appropriateness of providing antistatic clothing in the case of working environments in which there is a risk of explosion.

EYE PROTECTION

Wear a hood visor or protective visor combined with airtight goggles (see standard EN 166).

In the presence of risks of exposure to splashes or squirts during work, adequate mouth, nose and eye protection should be used to prevent accidental absorption.

RESPIRATORY PROTECTION

If the threshold value (e.g. TLV-TWA) is exceeded for the substance or one of the substances present in the product, wear a mask with a type AX filter, whose limit of use will be defined by the manufacturer (see standard EN 14387). In the presence of gases or vapours of various kinds and/or gases or vapours containing particulate (aerosol sprays, fumes, mists, etc.) combined filters are required.

Respiratory protection devices must be used if the technical measures adopted are not suitable for restricting the worker's exposure to the threshold values considered. The protection provided by masks is in any case limited.

If the substance considered is odourless or its olfactory threshold is higher than the corresponding TLV-TWA and in the case of an emergency, wear open-circuit compressed air breathing apparatus (in compliance with standard EN 137) or external air-intake breathing apparatus (in compliance with standard EN 138). For a correct choice of respiratory protection device, see standard EN 529.

ENVIRONMENTAL EXPOSURE CONTROLS

The emissions generated by manufacturing processes, including those generated by ventilation equipment, should be checked to ensure compliance with environmental standards.

Stability and reactivity

Reactivity

Information not available

Chemical stability

Information not available

Possibility of hazardous reactions

The product may react violently with water.

Reacts violently with water, releasing hydrochloric acid.

Conditions to avoid

Avoid overheating. Prevent moisture or water from penetrating inside the containers.

Avoid heat, flames and sparks. Avoid exposure to high temperatures and direct sunlight. Avoid exposure to moisture: reacts violently to water.

Reacts violently with water, moisture. Avoid oxidizing agents.

Incompatible materials

Strong acids, strong bases, strong oxidizing agents, ketones, aldehydes, water.

REACTIVES VIOLENTLY WITH WATER.

Hazardous decomposition products

In the event of fire, carbon monoxide, carbon dioxide, hydrochloric acid and SiO2 develop.

Disposal considerations

Waste treatment methods

Reuse, when possible. Product residues should be considered special hazardous waste. The hazard level of waste containing this product should be evaluated according to applicable regulations.

Disposal must be performed through an authorised waste management firm, in compliance with national and local regulations.

Waste transportation may be subject to ADR restrictions.

CONTAMINATED PACKAGING

Contaminated packaging must be recovered or disposed of in compliance with national waste management regulations.