JOHNSON MATTHEY PLATINUM/CHARCOAL CATALYST
Flammability | 1 | |
Toxicity | 2 | |
Body Contact | 1 | |
Reactivity | 1 | |
Chronic | 2 | |
SCALE: Min/Nil=0 Low=1 Moderate=2 High=3 Extreme=4 |
Dehydrogenation catalyst. This material will catalyse the oxidation of combustible organic
vapours, care must be exercised when catalysts are brought into contact with organic
liquids and/or combustible vapours in the presence of oxygen or air. The risk of ignition
can be reduced by cooling both the catalyst and the solvent before mixing and performing
the mixing under an inert atmosphere such as nitrogen, or by removing oxygen from the
system to eliminate the ignition potential. Since many catalysts are pyrophoric after use
in a hydrogenation reaction, they should, ideally, be filtered under an inert atmosphere.
If this is not possible the filtered solid should not be allowed to dry and should be
washed with water to minimise the organic content. Used filtered catalyst should be kept
wet and out of contact with combustible vapours and liquids.
Pt/C, "dehydrogenation catalyst", "platinum on charcoal catalyst"
May cause SENSITIZATION by skin contact.
Although ingestion is not thought to produce harmful effects, the material may still be damaging to the health of the individual following ingestion, especially where pre- existing organ (e.g. liver, kidney) damage is evident. Present definitions of harmful or toxic substances are generally based on doses producing mortality (death) rather than those producing morbidity (disease, ill-health). Gastrointestinal tract discomfort may produce nausea and vomiting. In an occupational setting however, ingestion of insignificant quantities is not thought to be cause for concern. Ingestion may result in nausea, abdominal irritation, pain and vomiting. Considered an unlikely route of entry in commercial/industrial environments.
There is some evidence to suggest that this material can causeeye irritation and damage in some persons.
The material is not thought to produce adverse health effects or skin irritation following contact (as classified using animal models). Nevertheless, good hygiene practice requires that exposure be kept to a minimum and that suitable gloves be used in an occupational setting. Sensitization may result in allergic dermatitis responses includingrash, itching, hives or swelling of extremities.
There is some evidence to suggest that this material, if inhaled, can irritate the throat and lungs of some persons. Although inhalation is not thought to produce harmful effects, the material may still produce health damage, especially where pre-existing organ (e.g. liver, kidney) damage is evident. Present definitions of harmful or toxic substances are generally confined to doses producing mortality (death) rather than those producing morbidity (disease, ill- health). Effects on lungs are significantly enhanced in the presence of respirableparticles. Persons with impaired respiratory function, airway diseases and conditions such as emphysema or chronic bronchitis, may incur further disability if excessive concentrations of particulate are inhaled.
Skin contact with the material is more likely to cause a sensitization reaction in some persons compared to the general population.
Principal routes of exposure are usually by inhalation of generated dust and skin contact with the material. Long term exposure to high dust concentrations may cause changes in lung function i.e. pneumoconiosis; caused by particles less than 0.5 micron penetrating and remaining in the lung. Prime symptom is breathlessness; lung shadows show on X-ray. As with any chemical product, contact with unprotected bare skin; inhalation of vapor, mist or dust in work place atmosphere; or ingestion in any form, should be avoided by observing good occupational work practice.