Selenium dioxide

Guidance on Safe Use

First-aid measures

Description of first aid measures

General information Remove contaminated clothing and shoes immediately, and launder thoroughly before reusing. In case of accident or if you feel unwell, seek medical advice immediately. If the patient is likely to become unconscious, place and transport in stable sideways position.

After inhalation

Remove affected person from the immediate area. Ensure supply of fresh air. Irregular breathing/no breathing: artificial respiration. Call a doctor immediately.

After skin contact

When in contact with the skin, clean with soap and water.

After eye contact

Separate eyelids, wash the eyes thoroughly with water (15 min.). Seek medical assistance.

After ingestion

Induce vomiting. Call a doctor immediately. Administer vitamin C as antidote and cause immediate vomiting. Toxic effect is superior to acid effect.

Most important symptoms and effects, both acute and delayed

No data available.

Indication of any immediate medical attention and special treatment needed

No data available.

Fire-fighting measures

Extinguishing media

Suitable extinguishing media

Product itself is non-combustible; adapt fire extinguishing measures to surrounding areas.

Unsuitable extinguishing media

Water

Special hazards arising from the substance or mixture

In case of combustion evolution of dangerous gases possible.

Advice for firefighters

Use self-contained breathing apparatus. The product is highly hygroscopic. Wear protective clothing. Contact with water causes the formation of selenous acid, which is also toxic and has a caustic effect. Fire residues and contaminated firefighting water must be disposed off in accordance with the local regulations.

Accidental release measures

Personal precautions, protective equipment and emergency procedures

For non-emergency personnel

Refer to protective measures listed in sections 'Handling and storage' and 'Exposure controls/personal protection'. Remove persons to safety. Avoid dust formation. Use breathing apparatus if exposed to vapours/dust/aerosol. For emergency responders No data available. Personal protective equipment (PPE) - see Section 'Exposure controls/personal protection'.

Environmental precautions

Do not discharge into the drains/surface waters/groundwater.

Methods and material for containment and cleaning up

Take up mechanically. Send in suitable containers for recovery or disposal.

Reference to other sections

No data available.

Handling and storage

Precautions for safe handling

Advice on safe handling

Provide good ventilation of working area (local exhaust ventilation, if necessary). Avoid the formation and deposition of dust. If workplace exposure limits are exceeded, respiratory protection approved for this particular job must be worn.

General protective and hygiene measures

Do not eat, drink or smoke during work time. Keep away from foodstuffs and beverages. Wash hands before breaks and after work. Do not inhale dust.Store work clothing separately. Avoid contact with eyes and skin. Provide eye wash fountain in work area. Have emergency shower available.

Advice on protection against fire and explosion

Avoid formation of dust. Keep away from sources of heat and ignition.

Conditions for safe storage, including any incompatibilities

Technical measures and storage conditions

Keep container tightly closed and dry in a cool, well-ventilated place. Protect from atmospheric moisture and water. Product is hygroscopic.

Requirements for storage rooms and vessels

Store product in closed containers. Keep only in the original container.

Advice on storage assembly

Do not store together with foodstuffs. Keep away from water.

Specific end use(s)

No data available.

Transport information

Land transport (UN RTDG/ADR/RID)

UN number:

UN3283

Shipping

Labels:

6.1

SpecialProvisions

Shipping

Remarks

Marine transport (UN RTDG/IMDG)

UN number:

UN3283

Shipping information

Proper shipping name and description:

SELENIUM COMPOUND, SOLID, N.O.S.

Chemical name:

Selenium dioxide

Labels:

6.1

Remarks

Air transport (UN RTDG/ICAO/IATA)

UN number:

UN3283

Shipping information

Proper shipping name and description:

Selenium compound, solid, n.o.s.

Chemical name:

Selenium dioxide

Labels:

6.1

Remarks

SpecialProvisions

Exposure controls / personal protection

Appropriate engineering controls

No data available.

Personal protective equipment

Respiratory protection

If workplace exposure limits are exceeded, a respiration protection approved for this particular job must be worn. Short term: filter apparatus, Filter P3

Eye / face protection

Tightly fitting safety glasses (EN 166).

Hand protection

Chemical resistant gloves (EN 374) Appropriate Material neoprene

Other

Acid-resistant protective clothing

Environmental exposure controls

No data available.

Stability and reactivity

Reactivity

No data available.

Chemical stability

Stable under normal temperatures and pressures.

Possibility of hazardous reactions

None, if handled according to order.

Conditions to avoid

The product is highly hygroscopic. Contact with water causes the formation of selenous acid, which is also toxic and has a caustic effect.

Incompatible materials

Water

Hazardous decomposition products

No hazardous decomposition products known.

Disposal considerations

Waste treatment methods

Product

Allocation of a waste code number, according to the European Waste Catalogue, should be carried out in agreement with the regional waste disposal company.

Packaging

Contaminated packaging should be emptied as far as possible and after appropriate cleansing may be taken for reuse. Packaging that cannot be cleaned should be disposed of in agreement with the regional waste disposal company.