Trimethylsilylacetylene

Guidance on Safe Use

First-aid measures

Description of first aid measures
General notes
Do not leave affected person unattended. Remove victim out of the danger area. Keep affected person warm, still
and covered. Take off immediately all contaminated clothing. In all cases of doubt, or when symptoms persist, seek
medical advice. In case of unconsciousness place person in the recovery position. Never give anything by mouth. In
case of accident or if you feel unwell, seek medical advice immediately.
Following inhalation
If breathing is irregular or stopped, immediately seek medical assistance and start first aid actions. Provide fresh air.
Following skin contact
Wash with plenty of soap and water.
Following eye contact
Remove contact lenses, if present and easy to do. Continue rinsing. Irrigate copiously with clean, fresh water for at
least 10 minutes, holding the eyelids apart.
Following ingestion
Rinse mouth with water (only if the person is conscious). Do NOT induce vomiting.

2. Most important symptoms and effects, both acute and delayed
Symptoms and effects are not known to date.

3. Indication of any immediate medical attention and special treatment needed
There is no additional information.

Fire-fighting measures

1. Extinguishing media
Suitable extinguishing media
Water spray, Alcohol resistant foam, Dry extinguishing powder, Carbon dioxide (CO2)
Unsuitable extinguishing media
Water jet

2. Special hazards arising from the substance or mixture
Highly flammable liquid and vapour. In case of insufficient ventilation and/or in use, may form flammable/explosive
vapour-air mixture. The vapours may be invisible and are heavier than air. Places which are not ventilated, e.g. unventilated
below ground level areas such as trenches, conduits and shafts, are particularly prone to the presence of
vapours.
Hazardous combustion products
Carbon monoxide (CO), Carbon dioxide (CO2), Silicon oxides

3. Advice for firefighters
In case of fire and/or explosion do not breathe fumes. Wear self-contained breathing apparatus. Fight fire with normal
precautions from a reasonable distance. Co-ordinate firefighting measures to the fire surroundings. Do not allow
firefighting water to enter drains or water courses. Collect contaminated firefighting water separately. Remove
undamaged containers from heat radiation. Keep containers cool with water spray. Precipitate combustion gases
with water spray if possible.

Accidental release measures

1. Personal precautions, protective equipment and emergency procedures
Wearing of suitable protective equipment (including personal protective equipment referred to under Section 8 of the
safety data sheet) to prevent any contamination of skin, eyes and personal clothing.
For non-emergency personnel
Remove persons to safety.
For emergency responders
Wear breathing apparatus if exposed to vapours/dust/spray/gases. Eliminate all ignition sources if safe to do so. Provision
of sufficient ventilation.

2. Environmental precautions
Keep away from drains, surface and ground water. Retain contaminated washing water and dispose of it.

3. Methods and material for containment and cleaning up
Advice on how to contain a spill
Bunding, Covering of drains
Advice on how to clean up a spill
Wipe up with absorbent material (e.g. cloth, fleece). Collect spillage: sawdust, kieselgur (diatomite), sand, universal
binder.
Use only non-sparking tools.
Other information relating to spills and releases
Place in appropriate containers for disposal. Ventilate affected area.

4. Reference to other sections: Hazardous combustion products: see section "Firefighting measures". Personal protective equipment: see section "Exposure controls/personal protection". Incompatible materials: see section "Stability and reactivity". Disposal considerations: see section "Disposal considerations".

Handling and storage

This substance is handled under Strictly Controlled Conditions in accordance with REACH regulation Article 18(4) for transported isolated intermediates. Site documentation to support safe handling arrangements including the selection of engineering, administrative and personal protective equipment controls in accordance with risk-based management systems is available at each Manufacturing site. Written confirmation of application of Strictly Controlled Conditions has been received from affected Distributor and Downstream Manufacturer/User of the Registrant's intermediate.

1. Precautions for safe handling
Recommendations
- measures to prevent fire as well as aerosol and dust generation
Use only in well-ventilated areas. Use local and general ventilation. Avoidance of ignition sources. Keep away from
sources of ignition - No smoking. Take precautionary measures against static discharge. Use explosion-proof electrical/
ventilating/lighting/equipment. Ground/bond container and receiving equipment. Use only non-sparking tools.
Due to danger of explosion, prevent leakage of vapours into cellars, flues and ditches.
- specific notes/details
Places which are not ventilated, e.g. unventilated below ground level areas such as trenches, conduits and shafts, are
particularly prone to the presence of flammable substances or mixtures. Vapours are heavier than air, spread along
floors and form explosive mixtures with air. Vapours may form explosive mixtures with air.
Advice on general occupational hygiene
Wash hands after use. Do not eat, drink and smoke in work areas. Remove contaminated clothing and protective
equipment before entering eating areas. Never keep food or drink in the vicinity of chemicals. Never place chemicals
in containers that are normally used for food or drink. Keep away from food, drink and animal feedingstuffs.

2. Conditions for safe storage, including any incompatibilities
Managing of associated risks
- explosive atmospheres
Keep container tightly closed and in a well-ventilated place. Use local and general ventilation. Keep cool. Protect
from sunlight.
- flammability hazards
Keep away from sources of ignition - No smoking. Keep away from heat, hot surfaces, sparks, open flames and other
ignition sources. No smoking. Take precautionary measures against static discharge. Protect from sunlight.
- ventilation requirements
Use local and general ventilation. Ground/bond container and receiving equipment.
- packaging compatibilities
Only packagings which are approved (e.g. acc. to ADR) may be used.

3. Specific end use(s)
This information is not available.

 

Transport information

Land transport (UN RTDG/ADR/RID)

UN number:

1993

Shipping information

Proper shipping name and description:

FLAMMABLE LIQUID, N.O.S.

Chemical name:

Trimethylsilylacetylene

Language:

English

Class or division:

Class 3: Flammable liquids

Packing group:

Packing group II: Substances presenting medium danger

Labels:

3

Special provisions / remarks

Special provisions:

Special provisions (SP): 274, 601, 640D

Remarks:

Classification code F1
Excepted quantities (EQ): E2
Limited quantities (LQ): 1 L
Transport category (TC): 2
Tunnel restriction code (TRC): D/E
Hazard identification No: 33
Emergency Action Code: 3YE

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

UN number:

1993

Shipping information

Proper shipping name and description:

FLAMMABLE LIQUID, N.O.S.

Chemical name:

Trimethylsilylacetylene

Language:

English

Class or division:

Class 3: Flammable liquids

Packing group:

Packing group II: Substances presenting medium danger

Labels:

3

Special provisions / remarks

Special provisions:

274, 601, 640D

Remarks:

Classification code F1
Excepted quantities (EQ): E2
Limited quantities (LQ): 1 L
Transport category (TC): 2
Tunnel restriction code (TRC): D/E
Hazard identification No: 33
Emergency Action Code: 3YE

Marine transport (UN RTDG/IMDG)

UN number:

1993

Shipping information

Proper shipping name and description:

FLAMMABLE LIQUID, N.O.S.

Chemical name:

Trimethylsilylacetylene

Language:

English

Class or division:

Class 3: Flammable liquids

Packing group:

Packing group II: Substances presenting medium danger

EmS code:

F-E

S-E

Labels:

3

Special provisions / remarks

Special provisions:

274

Remarks:

Excepted quantities (EQ): E2
Limited quantities (LQ): 1 L
Stowage category: B

Air transport (UN RTDG/ICAO/IATA)

UN number:

1993

Shipping information

Proper shipping name and description:

Flammable liquid, n.o.s.

Chemical name:

Trimethylsilylacetylene

Language:

English

Class or division:

Class 3: Flammable liquids

Packing group:

Packing group II: Substances presenting medium danger

Labels:

3

Special provisions / remarks

Special provisions:

A3

Remarks:

Excepted quantities (EQ): E2
Limited quantities (LQ): 1 L
ERG Code: 3H

Additional transport information

Additional information

Special provisions / remarks / other:

Special precautions for user: Provisions for dangerous goods (ADR) should be complied within the premises.
Maritime transport in bulk according to IMO instruments: The cargo is not intended to be carried in bulk.

Exposure controls / personal protection

This substance is handled under Strictly Controlled Conditions in accordance with REACH regulation Article 18(4) for transported isolated intermediates. Site documentation to support safe handling arrangements including the selection of engineering, administrative and personal protective equipment controls in accordance with risk-based management systems is available at each Manufacturing site. Written confirmation of application of Strictly Controlled Conditions has been received from affected Distributor and Downstream Manufacturer/User of the Registrant's intermediate.

1. Control parameters
Control parameters, national occupational exposure limit values (workplace exposure limits) as well as information on control parameters of possible hydrolysis products, solvents, impurities and/or additives hydrolysis products are provided in the safety data sheet.

2. Exposure controls
Appropriate engineering controls
Local and general ventilation.
Individual protection measures (personal protective equipment)
Eye/face protection
Wear eye/face protection.

Skin protection
- hand protection
Wear suitable gloves. Chemical protection gloves are suitable, which are tested according to EN 374. Check leaktightness/
impermeability prior to use. In the case of wanting to use the gloves again, clean them before taking off
and air them well.
- type of material IIR: isobutene-isoprene (butyl) rubber
- material thickness 0,7 mm
- breakthrough times of the glove material >480 minutes (permeation: level 6)
- other protection measures
For special purposes, it is recommended to check the resistance to chemicals of the protective gloves mentioned
above together with the supplier of these gloves.
Take recovery periods for skin regeneration. Preventive skin protection (barrier creams/ointments) is recommended.
Wash hands thoroughly after handling. Protective clothing against liquid chemicals. Footwear protecting against
chemicals.
Respiratory protection
In case of inadequate ventilation wear respiratory protection. Type: AX (gas filters and combined filters against lowboiling
point organic compounds, colour code: Brown).
Environmental exposure controls
Use appropriate container to avoid environmental contamination. Keep away from drains, surface and ground water.

 

Stability and reactivity

1. Reactivity
Concerning incompatibility: see below "Conditions to avoid" and "Incompatible materials". It's a reactive substance.
Risk of ignition.
If heated:
Risk of ignition

2. Chemical stability
Stable when stored and handled according to instructions.

3. Possibility of hazardous reactions
Dangerous/dangerous reactions with Bases: Flammable gases, Polymerisation

4. Conditions to avoid
Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
Hints to prevent fire or explosion
Use explosion-proof electrical/ventilating/lighting/equipment. Use only non-sparking tools. Take precautionary
measures against static discharge.

5. Incompatible materials
Strong acids, strong bases, Strong oxidising agents
Release of flammable materials with:
Bases

6. Hazardous decomposition products
Acetylene. Hazardous combustion products: see section "firefighting measures"

Disposal considerations

Waste treatment methods
Waste treatment-relevant information
Dispose of contents/container in accordance with local/regional/national/international regulations.
Sewage disposal-relevant information
Do not empty into drains. Avoid release to the environment. Refer to special instructions/safety data sheets.
Waste treatment of containers/packagings
It is a dangerous waste; only packagings which are approved (e.g. acc. to ADR) may be used. Completely emptied
packages can be recycled. Handle contaminated packages in the same way as the substance itself.
Remarks
Please consider the relevant national or regional provisions. Waste shall be separated into the categories that can be
handled separately by the local or national waste management facilities.