Osmium Tetroxide

1. Identification

Product Identifiers

Product Name

Osmium Tetroxide, 1g and Under

Other Names

N/A

Product Number(s)

19100 (C010) 19134 (C012), 19102 (C010-120), 19103 (C010-130), 19104 (C010-140), 19105 (C010-150), 19105-SP (C010-150), 19105-SPECIAL, 19110 (C010-1010), 19112, 19114, 19115, 19116, 19118-01, 19118-20G, 19120 (C010-05), 19130 (C010-0510), 19131 (C010-0550), 19132 (C010-02510)

CAS Number

20816-12-0

Recommended use of the chemical and restriction on use

Company Details

Emergency Contact Details

2. Hazards Identification

Classification of the substance or mixture

Label Elements

Signal Words

None

Hazard Statement(s)

• Fatal if swallowed.
• Fatal in contact with skin.
• Toxic if inhaled.
• Causes severe skin burns and eye damage.
• May cause respiratory irritation.

Precautionary Statement(s)

• Do not breathe dusts or mists.
• Do not get in eyes, on skin, or on clothing.
• Wash thoroughly after handling.
• Do not eat, drink or smoke when using this product.
• Use only outdoors or in a well-ventilated area.
• Wear protective gloves/protective clothing/eye protection/face protection.
• [In case of inadequate ventilation] wear respiratory protection.
• If swallowed: Immediately call a poison center/doctor.
• If swallowed: Rinse mouth. Do NOT induce vomiting.
• If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
• IF INHALED: Remove person to fresh air and keep comfortable for breathing.
• If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do.
• Continue rinsing.
• Specific treatment is urgent (see on this label).
• Take off immediately all contaminated clothing and wash it before reuse.
• Store in a well-ventilated place. Keep container tightly closed.
• Store locked up.
• Dispose of contents/container in accordance with local/regional/national/international regulations.

Primary route(s) of entry

Human Health

Inhalation

Remove person to fresh air and keep comfortable for breathing.

Ingestion

• Immediately call a POISON CENTRE/ doctor.
• Rinse mouth. Do NOT induce vomiting.

Eyes

Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Skin

(or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.

Environment

3. Composition / Information on Ingredients

4. First Aid Measures

Ingestion

• Do not induce vomiting; call for medical help immediately.
• Drink plenty of water and provide fresh air. Call for a doctor immediately.

Inhalation

• Supply fresh air or oxygen; call for doctor.
• In case of unconsciousness place patient stably in side position for transportation.

Skin Contact

Immediately wash with water and soap and rinse thoroughly.

Eye Contact

Rinse opened eye for several minutes under running water. Then consult a doctor.

Other Information

• Immediately remove any clothing soiled by the product.
• Remove breathing equipment only after contaminated clothing have been completely removed.
• In case of irregular breathing or respiratory arrest provide artificial respiration.

5. Firefighting Measures

Suitable extinguishing equipment

Fire

CO₂, powder or water spray. Fight larger fires with water spray or alcohol resistant foam.

HAZCHEM

Not available.

Special protective equipment and precautions for fire fighters

6. Accidental Release Measures

Personal precautions, protective equipment and emergency procedures

Wear protective equipment. Keep unprotected persons away.

Environmental precautions

Do not allow to enter sewers/ surface or ground water.

Methods and materials for containment and clean up

• Use neutralising agent.
• Dispose contaminated material as waste according to item 13.
• Ensure adequate ventilation.
• Protective Action Criteria for Chemicals
• PAC-1: 6.00E-04 ppm
• PAC-2: 0.0084 ppm
• PAC-3: 4.0 ppm

7. Handling and Storage

Precautions for safe handling

• Thorough dedusting.
• Ensure good ventilation/exhaustion at the workplace.
• Open and handle receptacle with care.
• Keep respiratory protective device available.

Conditions for safe storage

• Store locked up.
• Store in a well-ventilated place. Keep container tightly closed.

8. Exposure Controls / Personal Protection

Exposure Standards

Engineering controls

No special requirements.

Personal protective equipment

Eye and face protection

Tightly sealed goggles

Skin protection

• Protective gloves
• The glove material has to be impermeable and resistant to the product/ the substance/ the preparation.
• Due to missing tests no recommendation to the glove material can be given for the product/ the preparation/ the chemical mixture. Selection of the glove material on consideration of the penetration times, rates of diffusion and the degradation ·
• Material of gloves
• The selection of the suitable gloves does not only depend on the material, but also on further marks of quality and varies from manufacturer to manufacturer. ·
• Penetration time of glove material
• The exact break through time has to be found out by the manufacturer of the protective gloves and has to be observe.

Body protection

• Keep away from foodstuffs, beverages and feed.
• Immediately remove all soiled and contaminated clothing.
• Wash hands before breaks and at the end of work.
• Store protective clothing separately.
• Avoid contact with the eyes and skin.

Respiratory protection

In case of brief exposure or low pollution use respiratory filter device. In case of intensive or longer exposure use self-contained respiratory protective device

9. Physical and Chemical Properties

General information

Appearance

Light yellow crystalline

Odour

Like chlorine

pH

6-7

Vapour Pressure

at 20 °C (68 °F): 10 hPa (7.5 mm Hg)

Density

at 20 °C (68 °F): 4.906 g/cm³ (40.94057 lbs/gal)

Boiling Point

130 °C (266 °F)

Melting Point

40.1 °C (104.2 °F)

Solubility

Insoluble.

Specific Gravity of Density

Not applicable

Flash Point

Not applicable

Flammable (Explosive) Limits

Not determined

Ignition Temperature

Not determined

Formula

Not available

10. Stability and Reactivity

Reactivity

No further relevant information available.

Chemical stability

No decomposition if used according to specifications.

Possibility of hazardous reactions

No dangerous reactions known.

Conditions to avoid

No further relevant information available.

Incompatible materials

No further relevant information available.

11. Toxicological Information

Acute effects

No further relevant information available.

Eye contact

Strong caustic effect.

Skin contact

Caustic effect on skin and mucous membranes.

Ingestion

• Danger through skin adsorption.
• Swallowing will lead to a strong caustic effect on mouth and throat and to the danger of perforation of esophagus and stomach.

Inhalation

No sensitising effects known.

Toxicity and irritation

• Carcinogenic categories
• IARC (International Agency for Research on Cancer) Substance is not listed.
• NTP (National Toxicology Program) Substance is not listed.
• OSHA-Ca (Occupational Safety Health Administration) Substance is not listed.

12. Ecological Information

Ecotoxicity

No further relevant information available.

Persistence and degradability

No further relevant information available.

Bioaccumulative potential

No further relevant information available.

Other adverse effects

• Water hazard class 2 (German Regulation) (Self-assessment): hazardous for water
• Do not allow product to reach ground water, water course or sewage system.
• Must not reach sewage water or drainage ditch undiluted or unneutralisd.
• Danger to drinking water if even small quantities leak into the ground.

13. Disposal Considerations

General information

14. Transport Information

ADG label required

HAZCHEM

Not available.

UN Number

UN2471

Proper shipping name

2471 OSMIUM TETROXIDE

Transport hazard class

6.1

Packing group

Not regulated.

Environmental hazard

Not applicable.

Special precautions for users

Warning: Toxic substances

Additional information

• Hazard identification number (Kemler code): 66
• EMS Number: F-A,S-A
• Stowage Category B
• Stowage Code SW2 Clear of living quarters
• Transport in bulk according to Annex II of
• MARPOL73/78 and the IBC Code Not applicable.
• Quantity limitations On passenger aircraft/rail: 5 kg
• On cargo aircraft only: 50 kg
• Hazardous substance: 1000 lbs, 454 kg
• Remarks: Special marking with the symbol (fish and tree)
• Excepted quantities (EQ) Code: E5
• Maximum net quantity per inner packaging: 1 g
• Maximum net quantity per outer packaging: 300 g

15. Regulatory Information

Poisons Schedule Number

Substance is not listed.

Other Information

No further relevant information available.

16. Other Information

SDS preparation date

25 February 2026

Comments

This information is based on our present knowledge. However, this shall not constitute a guarantee for any specific product features and shall not establish a legally valid contractual relationship.