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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Guidance on Safe Use

Guidance on Safe Use

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Administrative data

First-aid measures

Description of first aid measures

Observe self-protection

Remove victims from hazardous area.

Remove contaminated or saturated clothing immediately and dispose of safely.


If aerosol or mists are formed:

Consult a physician immediately.

Move victims into fresh air.

Do not leave victims unattended.

Keep patient warm and at rest.

Place person on side in stable position if unconscious.

Skin contact

Wash off immediately with plenty of water.

In case of complaints: Consult doctor immediately.

Eye contact

Keeping eyelid open, immediately rinse thoroughly for at least 5 minutes using plenty of water or, if necessary, eye rinsing solution.

In case of persistent discomfort: Consult an ophthalmologist.


Inform emergency physician immediately.

Only when patient fully conscious:

Have the mouth rinsed with water.

Do not leave victims unattended.

Keep warm and in a quiet place.

Place person on side in stable position if unconscious.

Most important symptoms and effects, both acute and delayed


None known


None known

Indication of any immediate medical attention and special treatment needed

If substance has been swallowed:

Gastric lavage, administration of activated charcoal, acceleration of gastrointestinal passage.

Fire-fighting measures

Suitable extinguishing media

foam, water spray, CO2, dry powder

Special hazards arising from the substance or mixture

Closed container may rupture if strongly heated.

In case of fire cool endangered containers with water.

Special protective equipment for fire-fighters

In case of fire: wear a self contained respiratory apparatus

Advice for firefighters

Water used to extinguish fire should not enter drainage systems, soil or stretches of water.

Ensure there are sufficient retaining facilities for water used to extinguish fire.

Fire residues and contaminated fire extinguishing water must be disposed of in accordance with local regulations.

Accidental release measures

Personal precautions, protective equipment and emergency procedures

Wear personal protective equipment; see section 8.

Keep out unprotected persons.

Do not inhale vapours / aerosols.

Leave room immediately.

Alert all persons!

Keep away from sources of ignition - No smoking.

Environmental precautions

Do not allow entrance in sewage water, soil stretches of water, groundwater, drainage systems.

Should not be released into the environment.

Cover over drainage system. Avoid penetration into drainage system or in rooms situated at a lower level because of danger of explosion.

Methods and material for containment and cleaning up

Soak up with inert absorbent material (e.g. sand, silica gel, acid binder, universal binder, sawdust).

Fill into marked, sealable containers.

To be disposed of in compliance with existing regulations.

Suitable binder:       diatomaceous earth, universal absorbent

Handling and storage


Precautions for safe handling

Open the containers with caution.

If possible, use material transfer/filling, metering and blending plants that are closed, or provide for local suction devices.

Advice on protection against fire and explosion

Take precautionary measures against static discharges.

Keep away from sources of ignition - No smoking.

Explosion protection equipment required.

When repairs of the production system are to be made (e.g. welding work), the section to be repaired must be essentially free of product.


Conditions for safe storage, including any incompatibilities

Keep containers tightly closed in a cool, well-ventilated place.

Protect from moisture.

Comply with storage regulations and regulations prohibiting storage of hazardous substances in non-stationary containers in the same room (TRGS 510).

Transport information

Land transport (UN RTDG/ADR/RID)

UN number:
Shippingopen allclose all
ADR/RID: 6.1 (3)
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Inland waterway transport (UN RTDG/ADN(R))

UN number:
Shippingopen allclose all
ADR/RID: 6.1(3)
Remarksopen allclose all

Marine transport (UN RTDG/IMDG)

UN number:
Shipping information
Proper shipping name and description:
Chemical name:
tetramethyl orthosilicate
Remarksopen allclose all
Shippingopen allclose all
Remarksopen allclose all
SpecialProvisionsopen allclose all

Exposure controls / personal protection

Control parameters

Engineering measures

If possible, use material transfer/filling, metering and blending plants that are closed, or provide for local suction devices.

Priority should be given to closed-system units.

Personal protective equipment

Respiratory protection

In case of dusts/vapours/aerosols being formed or if the limit values like TLV are exceeded:

use respiratory equipment with suitable filter (filter type A) or wear a self contained respiratory apparatus

Use only respiratory protection equipment with CE-symbol including four digit test number.

The filter class for the respirator must be suitable for the maximum expected contaminant concentration (gas/vapour/aerosol/particulates) that may arise when handling the product. If this concentration is exceeded, self-contained breathing apparatus must be used.

Note time limit for wearing respiratory protective equipment.

Hand protection

Glove material       for example, butyl-rubber

Material thickness       0,5 mm

Break through time       >= 480 min

Selection of protective gloves to meet the requirements of specific workplaces.

Suitability for specific workplaces should be clarified with protective glove manufacturers.

The information is based on our own tests, references from the literature and information from glove manufacturers, or derived by analogy with similar materials.

Please observe that the daily duration of usage of a chemical protective glove is in practice far shorter due to the many influencing factors (e.g. temperature, mechanical strain on the glove material) than the permeation time determined acc. EN 374.

Eye protection

close-fitting protective goggles (e.g. closed goggles)

Skin and body protection

When handling larger quantities:

Wear protective clothing made from non-flammable fibres.

Hygiene measures

When using, do not eat, drink or smoke. Wash face and/or hands before break and end of work.

Remove immediately all contaminated clothing.

Wash contaminated clothing before re-use.

Protective measures

Handle in accordance with good industrial hygiene and safety practices.

It should be defined in the work place in the form of a risk analysis according to directive 89/686/EEC and amendments.

If workplace exposure limits are exceeded and/or larger amounts are released (leakage, spilling, dust) the indicated respiratory protection should be used.

If there is the possibility of skin/eye contact, the indicated hand/eye/body protection should be used.

Do not breathe in vapours or aerosols.

Avoid contact with skin and eyes.

Stability and reactivity

Incompatible materials

Exothermic reaction with:, acids, alkalines, Incompatibility with, humidity, water

Hazardous decomposition products

Methanol in case of hydrolysis.

Disposal considerations


With respect to local regulations, e.g. dispose of to suitable waste incineration plant.

Uncleaned packaging

Do not reuse empty containers and dispose of in accordance with the regulations issued by the appropriate local authorities.

If there is product residue in the emptied container, follow directions for handling on the container's label.

Incorrect disposal or reuse of this container is illegal and can be dangerous.

Other countries: observe the national regulations.

Waste Key Number

No waste key number as per the European Waste Types List can be assigned to this product, since such classification is based on the (as yet undetermined) use to which the product is put by the consumer.

The waste key number must be determined as per the European Waste Types List (decision on EU Waste Types List 2000/532/EC) in cooperation with the disposal firm / producing firm / official authority.