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CNESSTSanté et sécurité du travailEnglishPreventionRépertoire toxicologiqueFiche Resumé
CAS Number : 1304-56-9
Beryllium oxide is an odourless white solid. Depending on the heat treatment, crystal solid or amorphous fine powder are obtained.
Classes : D1A, D2A and D2B
Up to 2 µg/m3 as Be
Over 2 µg/m3as Be
According to the Regulation respecting occupational health and safety
Time-weighted average exposure value (TWAEV): 0,002 mg/m3 (2 µg/m3), value as Be (beryllium).
Designation and remarks :
To protect workers, an action level of 0,2 µ/m3 (as Be) has been established as exposure value not to be exceeded.
InhalationIn case of inhalation of dusts or fumes, move the person to fresh air and place the person in half-upright position. If breathing has stopped, administer artificial respiration. In case of breathing difficulties, give oxygen. Transfer the person immediately to the nearest medical emergency centre.
Eye contactRinse the eyes with plenty of water for 5 minutes or until the product has been eliminated. If the irritation persists, consult a physician.
Skin contactRemove contaminated clothes promptly. Wash the skin with water and soap. Clean thoroughly skin cuts or wounds. Material accidentally implanted under skin must be removed. Consult a physician.
IngestionRinse mouth. Consult a physician.
This product is not flammable.
Berylium oxide heated with magnesium powder may explode.
Fire fighting and special procedures
Use any extinction agent suitable for surrounding fire. Wear a self-contained breathing apparatus and full protective clothing.
Beryllium oxide does not burn.
Exposure in the workplace occurs by inhalation of dusts or fumes and on contact with the skin.
Effects of short-term exposure
Inhalation of massive amounts of fumes or dusts can cause chemical pneumonia within 72 hours. The symptoms are cough, chest pain, progressive shortness of breath, general weakness and tiredness with fever. Pulmonary edema (fluid accumulation in the lungs) can occur. Nowadays, such conditions are rare in the workplace.
The embedding of small beryllium oxide particles in the skin can lead to the formation of ulcers and small nodules.
Effects of repeated or prolonged exposure
Inhalation, even in very small quantities and over relatively short periods, can cause a chronic pulmonary disease known as beryllosis and which is incurable. This disease begins with a sensitization to beryllium which is a kind of allergy without noticing any symptoms. As the disease is developping the main symptoms include shortness of breath (especially with activity), cough, fatigue, loss of appetite, weight loss, fever and night sweats. In more serious case, the disease may end by a cardiorespiratory insufficiency causing death.
Rash (eczema) and small wart-like nodules can be seen on the skin.
Beryllium and its compounds are carcinogenic for humans.
In presence of beryllium oxide dust or powder, wear a self-contained breathing apparatus, if the concentration in the workplace is greater than the stated action level of 0,2 µg/m3 (as beryllium) and even at lower level. Up to 2 µg/m3 (as beryllium), wear an air-purifying respirator with a 100-series filter (N,P or R-type), with a half facepiece, eye protection and skin protection or a full facepiece. Over 2 µg/m3 (as beryllium), wear a supplied-air respirator with a full facepiece or any self-contained breathing apparatus. Other equipment may be acceptable depending on exposure conditions.
In the workplace area, wear protective clothing and gloves. Selection of protective clothing depends on the type of work.
In presence of beryllium oxide dusts or powder, wear eye protection. Selection of eye protection depends on the type of work and on the type of the breathing apparatus employed. Depending on the situation, safety glasses, dust-proof goggles or face shield are recommanded.
This product is very toxic : avoid all operations or processes releasing a cloud of dust or fine particles. Avoid all contact with skin and eyes. Do not eat or drink when using this product. Adopt a very strict personal hygiene. Double changing room should be provided (one for working clothes, one for street clothes). Precautions should be taken to avoid beryllium oxide dispersion and environmental contamination.
Store away from high fire risk area, away from incompatible products, in a cool and well ventilated area. Store powder in a clearly identified tightly closed container.
Leak or spill
Only properly trained personnel can do the clean up. Establish a restricted zone for the spill area until the clean up has been completed. Use a high-efficiency particulate air (HEPA) vacuum cleaner to clean equipment and floor in the working area. Wear full protective clothing including a self-contained breathing apparatus.
Beryllium oxide waste must be kept in a tightly closed container, clearly identified, and transfered to a firm specializing in beryllium oxide recycling.