ICSC 1710 - SODIUM HYDROGENSULFIDE

SODIUM HYDROGENSULFIDE

ICSC: 1710
_{Peer-Review Status: 09.04.2008 Validated}

Sodium sulhydrate
Sodium bisulfide
Sodium mercaptan
Sodium mercaptide
Sodium hydrosulfide

CAS #: 16721-80-5 RTECS #: WE1900000
UN #: see Notes
EINECS #: 240-778-0

Formula: NaHS
Molecular mass: 56.1

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.	Use water spray, foam, powder, carbon dioxide.
EXPLOSION			In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water.

EXPOSURE		AVOID ALL CONTACT!	IN ALL CASES CONSULT A DOCTOR!
Inhalation	Sore throat. Burning sensation. Shortness of breath. Laboured breathing. Unconciousness.	Use local exhaust or breathing protection.	Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention.
Skin	Redness. Pain. Skin burns.	Protective gloves. Protective clothing.	Rinse skin with plenty of water or shower. Refer immediately for medical attention.
Eyes	Redness. Pain. Burns.	Wear safety goggles or eye protection in combination with breathing protection.	Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention.
Ingestion	Sore throat. Burns in mouth and throat. Abdominal pain. Vomiting. Shock or collapse.	Do not eat, drink, or smoke during work.	Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer immediately for medical attention.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance and filter respirator for inorganic gases and vapours adapted to the airborne concentration of the substance. Sweep spilled substance into covered plastic containers. Then store and dispose of according to local regulations.	Do not transport with food and feedstuffs. EC Classification UN Classification GHS Classification Signal: Danger Fatal if swallowed Toxic in contact with skin Causes severe skin burns and eye damage May cause respiratory irritation

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-80S2949 or 80GC6-II+III for UN 2949; 42GS4-II+III for UN 2318.	Fireproof. Dry. Keep in a well-ventilated room. Separated from acids and strong oxidants.

IMPORTANT DATA

Physical State; Appearance
WHITE HYGROSCOPIC CRYSTALS WITH CHARACTERISTIC ODOUR.

Physical dangers

Chemical dangers
The solution in water is a strong base. It reacts violently with acid and is corrosive. Decomposes on heating. This produces sulfur oxides. Decomposes on contact with water. This produces hydrogen sulfide. Attacks metal. Reacts with strong oxidants. This produces sulfur oxides (See ICSC 0165).

Occupational exposure limits
TLV not established.
MAK (not established):.

Routes of exposure
Serious local effects by all routes of exposure.

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Inhalation may cause lung oedema. See Notes. Corrosive on ingestion. The substance hydrolyses rapidly on exposure to moisture releasing H2S. See ICSC 0165 .

Effects of long-term or repeated exposure

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Decomposes at 350°C Density: 1.8 g/cm³ Solubility in water, g/100ml at 20°C: 50-60 (good) Vapour pressure: negligible Octanol/water partition coefficient as log Pow: -3.5

NOTES

CAS No for sodium hydrogensulfide hydrate is 207683-19-0.
UN 2318 refers to SODIUM HYDROSULFIDE with less than 25% water of crystallization; Hazard Class 4.2, Packing Group II.
UN 2949 refers to SODIUM HYDROSULFIDE, hydrated with not less than 25% water of crystallization; Hazard Class 8 (corrosive), Packing Group II
Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered.

ADDITIONAL INFORMATION

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012

LEGAL NOTICE

Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.

    See Also:
       Toxicological Abbreviations