Health and Safety Recommendations for Thermocromex Premixed Mortar by St Astier (EN/BS 998.1)

Product and Manufacturer Identification

Ready mixed mortar in 30KG bags

Name: Dordognaise (C.E.S.A. Group)
Address: 28 bis route de Montanceix, La Jarthe – 24110 Saint-Astier, France
Phone: +33 (0)5 33 54 1125
Fax: +33 (0)5 33 04 6791

In case of emergency
France: ORFILA / +33 (0)1 45 42 59 59
The United Kingdom: The Lime Line / +44 (0) 800 7839 014
Ireland: The Traditional Lime Co. / +44 (0) 599 15 17 50 


Thermocromex is a ready mixed mortar based on natural hydraulic lime, cement, siliceous and calcareous sand, additives and pigments.

Thermocromex is not classified as a « dangerous product » as defined in annex VI of the directive 67 / 548 / CEE. However, because of its alcaline properties in solution, some handling precautions are necessary.

Risk symbol Principal risks for people and the environment
Thermocromex is irritant for eyes, respiratory track and mucous membranes.

Risk of severe eye damage in cases of splashes of powder or wet mortar in the eyes.

Once hydrated, Thermocromex increases alcalinity and therefore can irritate or dry the skin.

In cases of significant ingestion Thermocromex is caustic for the digestive tract. It can cause burning of the mouth, esophagus and stomac.

Thermocromex does not present particular risks for the environment subject to the recommendations in section XIII and the respect of national or locad disposal directives.

First Aid (urgent cases)

Contact with eyes
Wash immediately and abundantely with clean water and consult an ophtalmologist.
Contact with the skin
In case of prolongued contact with the skin :

If Thermocromex is in a dry state, eliminate dust as much as possible. Wash abundantely with clean water.

If Thermocromex is in a wet mortar state, wash abundantely with clean water.

Make sure that no product is left between skin and clothing or accessories (watches, shoes etc…).
In case of inhalation of large amounts of dust:

Bring the affected person outside the dusty area. Consult a doctor in case of respiratory problems
In cases of significant ingestion

Rinse mouth, drink potable water and consult a doctor

Anti fire measures

Thermocromex is not flammable. In case of nearby fire use any extinguishing agents (as required by the nature of the fire).

Accidental spillage measures

Individual precautions
Avoid all contacts with the eyes

Avoid contact with the skin

Avoid dust inhalation

In case of airborne dust use the appropriate anti dust mask

Handle the product with the appropriate gloves
Protection of the environment
Do not dispose of Thermocromex in sewers, drains and on surface waters.
Cleaning and recovery methods
Use preferably collecting methods so as to avoid the creation of dust in the air

After collection, Thermocromex can be disposed as normal building waste. Thermocromex hardens approximately 60 to 90 minutes after mixing with water.

Usage and handling precautions

Keep away from children reach.
Avoid creating airborne dust. If unavoidable, wear an anti dust mask

Avoid direct contact of Thermocromex with eyes, skin and mucous membranes.

Wearing security glasses is recommended.
The handling of Thermocromex bags has to be done in such a way as to avoid the creation of airborne dust.

Handle Thermocromex in accordance with local health and safety directives.


Exposure control

Total Dust:
10 mg/m3
Cellular dust:
5 mg/m3

Individuals' protection

Respiratory protection:
In the presence of airborne dust, the use of an anti dust mask is recommended.
Hands protection:
Wear adequate gloves
Eyes protection:
Wear protective goggles in case of airborne dust or risk of splashes of powder or wet mortar.
Skin protection:
Wear adequate work clothing covering the arms and extend it to the hands by wearing gloves. If working standing on knees, wear knee pads. Skin protective creams can also be used.

Physical and chemical properties

Grey powder
PH in water solution:
Alcaline between 12 and 13
Fusion temperature:
> 1000°C
Apparent volumetric mass:
1,35 g/cm3 at 20oC
Explosion point:
Not applicable
Flammable point:
Not applicable
Danger of explosion:
20 to 30 % of fines < 80 µ

Stability and reactivity

The product is stable
Conditions to avoid:
Humidity can cause hardening of the product
Materials to avoid:
Dangerous decomposition products :

Toxicological information

Thermocromex can cause the irritation of the respiratory track and inflammation of nasal mucous membranes. In extreme cases the erosion of mucous membranes is possible
In cases of significant ingestion Thermocromex is caustic for the digestive tract. It can cause burning of the mouth, esophagus and stomac.
Skin contact:
Due to its alcalinity in solution, Thermocromex can irritate the skin.

A prolongued contact with Thermocromex could cause burning of the skin.
Contact with the eyes:
Thermocromex can cause irritation and severe lesion of the pupil. Prolongued washing and ophtalmologic consultation are recommended
Chronic hands, skin disorders:
Prolongued exposure without adequate protection (gloves) can cause dermatitis
Cancer risks:
Not found
Not found

Ecological information

Potential bio-accumulation:
In case of accidental dispersion in waters, the Thermocromex powder could moderately increase the water pH.

Disposal information

After hardening, as a mortar waste, Thermocromex can be disposed of together with other construction site waste and stockpiled in discharge sites following the regulations valid at the time of disposal.

Transport information

Classified as non hazardous merchandise in accordance with transport regulations.

Compulsory information

Danger symbol:
Xi irritant
Principal components:
Calcareous sand and NHL lime
Phrases R:
R36/37/38- irritant for the eyes, respitatory tracks and skin

R41 - risks of severe eyes lesion.
Phrases S:
S2 keep away from childrens’ reach
S24/25 avoid contact with skin and eyes
S26 in case of contact with the eyes wash immediately and abundantely with clean water and consult a specialist
S37 wear adequate gloves.
Professional illnesses:
Social security code : not applicable
Special medical surveillance:
Not envisaged


The recommendations in this document are based on our kowledge as it stands today related to Natural Hydraulic Limes,sands and additives. They are given in good faith.

Under no circumstance the information can be considered as a quality guarantee.

The User attention is drawn to the eventual risks caused by the utilisation of a product for different purposes from the ones for which the product has been envisaged. It is the responsibility of the User to adopt the appropiate safety measures and to apply all regulations current at the time of use. The prescriptions contained in this document are given to help the User to fulfill its obligations. The precautions listed cannot be considered as exhaustive.

See Also: Thermocromex Data Sheet