ICSC 0712 - DECABORANE

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

DECABORANE

ICSC: 0712
_{October 1997}

Boron hydride
Decaboron tetradecahydride

CAS No: 17702-41-9
RTECS No: HD1400000
UN No: 1868

B₁₀H₁₄
Molecular mass: 122.2

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	Combustible. Gives off irritating or toxic fumes (or gases) in a fire.	NO open flames. NO contact with halogenated compounds, oxidizers.	Special powder, dry sand, NO other agents.
EXPLOSION	Above 80°C explosive vapour/air mixtures may be formed. Finely dispersed particles form explosive mixtures in air.	Above 80°C use a closed system, ventilation, and explosion-proof electrical equipment.	In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water.

EXPOSURE		PREVENT DISPERSION OF DUST! STRICT HYGIENE!
Inhalation	Cough. Dizziness. Drowsiness. Headache. Sweating. Nausea. Sore throat. Weakness. Tremors. Incoordination. Symptoms may be delayed (see Notes).	Ventilation (not if powder), local exhaust, or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	MAY BE ABSORBED! Redness. (See Inhalation).	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes	Redness.	Face shield.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion	(See Inhalation).	Do not eat, drink, or smoke during work. Wash hands before eating.	Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Personal protection: complete protective clothing including self-contained breathing apparatus.	UN Hazard Class: 4.1 UN Subsidiary Risks: 6.1 UN Pack Group: II	Do not transport with food and feedstuffs.

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-41GFT2-II+III NFPA Code: H3; F2; R1	Fireproof. Separated from food and feedstuffs, halogens, and other oxidants. Cool. Dry.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS TO WHITE CRYSTALS, WITH PUNGENT ODOUR.

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air.

Chemical dangers
May explode on heating or contact with flames. The substance decomposes slowly on heating to 300°C to form boron and the flammable gas, hydrogen - see ICSC 0001, and on burning producing toxic fumes (boron oxides). Reacts slowly with halogenated materials and ethers to form impact-sensitive materials. Undergoes explosive reaction with oxidants. Reacts with water or moisture to form flammable gas (hydrogen - see ICSC 0001). Attacks natural rubber, some synthetic rubbers, some greases and some lubricants.

Occupational exposure limits
TLV: 0.05 ppm as TWA, 0.15 ppm as STEL; (skin); (ACGIH 2004).
MAK: 0.05 ppm, 0.25 mg/m³; Peak limitation category: II(2); skin absorption (H); (DFG 2004).

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.

Effects of short-term exposure
The aerosol irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system, resulting in fatigue, hyperexcitability and narcosis. The effects may be delayed. Medical observation is indicated.

Effects of long-term or repeated exposure
The substance may have effects on the central nervous system, resulting in fatigue, inability to concentrate and lack of coordination.

PHYSICAL PROPERTIES

ENVIRONMENTAL DATA

Boiling point: 213°C
Melting point: 99.6°C
Relative density (water = 1): 0.9
Solubility in water: Slightly soluble in cold water; hydrolyses in hot water
Vapour pressure, Pa at 25°C: 6.65
Relative vapour density (air = 1): 4.2 (at boiling point)
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flash point: 80°C c.c.
Auto-ignition temperature: 149°C
Explosive limits, vol% in air: see Notes

NOTES

The onset of symtoms is frequently delayed for 24 to 48 hours after exposure.
Explosive limits are unknown in literature.
Reacts violently with fire extinguishing agents such as halons.
The odour warning when the exposure limit value is exceeded is insufficient.
Do NOT take working clothes home.
Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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