7
BERYLLIUM
P r e c a u t i o n s f o r u s e
GB
2. Precautions for use
The following precautions for use must be scrupulously followed.
2.2. The beryllium dome must never come into contact with abrasive materials
At room temperature, beryllium is a stable product; however it does react with sulphuric acid, hydrochloric
acid and hydrofluoric acid to release hydrogen.
Conditions to avoid:
high temperatures, sparks, naked flames or other ignition sources. Beryllium is not
compatible with oxidising agents and also particularly bromine pentafluoride and performic acid. It will
explode when heated with magnesium.
In its finely divided form, beryllium is a moderately flammable product. In a confined space, a cloud of
metal dust can explode in the presence of an ignition source. In the event of a fire, beryllium emits smoke
and highly toxic fumes.
In the event of a fire, the extinguishing agents which are stipulated are special powders for metal fires
or if these are unavailable, other inert powders. It is also advisable to wear adequate personal protection
to prevent contact with the substance or its combustion products as well as an integral self-contained
respirator with pressure regulator or which is pressurised.
2.3.
As a general rule, contact with skin or eyes, inhalation or ingestion of all or part of the beryllium dome
should be avoided. The manufacturer stresses that the absorption of beryllium through the respiratory,
cutaneous or digestive tract may cause severe physical disturbances.
3. Instructions in case of damage to the dome
If the beryllium dome is damaged in any way, it should be covered as soon as possible. We recommend
that you contact the retailer to have the tweeter dismantled and replaced by trained personnel at the
distributor.
If the dome is broken, any beryllium particles should be carefully collected and then placed in a hermetically
sealed plastic bag. It should be sent back to the retailer at the same time as the speaker.
4. First aid
In case of inhalation:
If beryllium or beryllium dust is inhaled, bring the affected person outside or to an
aerated place and put them in a semi-seated position so that they can breathe comfortably. If the person
is not breathing, administer artificial respiration. In case of respiratory difficulties, give the person oxygen.
Transfer the person to the nearest medical services or call an anti-poison centre.
In case of contact with the eyes:
Rinse immediately using plenty of water for 15 minutes or until all of the
product has been removed. Remove contact lenses if the person in question is wearing them and if they
can be removed easily. We recommend that you contact a doctor.
2.1. The tweeters contain a beryllium dome and must therefore be handled with caution.
Users of the speakers must particularly ensure that the grille or all other protective parts of the
tweeter are cared for and the beryllium must under no circumstances be removed from its original
location.
As a general rule, speakers must be kept out of the reach of children and specifically access to the
tweeter and to the beryllium dome must be prevented.
