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HYDROXYLAMINE (50% aqueous solution)ICSC: 1747
OxammoniumNovember 2019
CAS #: 7803-49-8
UN #: 2735
EC Number: 232-259-2

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  Risk of explosion on heating.  NO open flames.    Use water, alcohol-resistant foam, powder.  In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. 

 AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Dizziness. Headache. Blue lips, fingernails and skin. Shortness of breath. Weakness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Administration of oxygen may be needed. Refer immediately for medical attention. See Notes. 
Skin MAY BE ABSORBED! Redness. Pain. Further see Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer immediately for medical attention . 
Eyes Redness. Pain. Severe burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Nausea. Vomiting. Symptoms may be delayed. Further see Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Administration of oxygen may be needed. Refer immediately for medical attention. See Notes. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: filter respirator for inorganic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in covered non-metallic containers as far as possible. Absorb remaining liquid in inert absorbent. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

correxcl mark;warncancer;health hazenviro;aqua
DANGER
May be corrosive to metals
Harmful if swallowed or in contact with skin
Causes skin irritation
Causes serious eye damage
May cause an allergic skin reaction
Suspected of causing cancer
May cause respiratory irritation
May cause damage to blood
May cause damage to blood through prolonged or repeated exposure
Very toxic to aquatic life 

Transportation
UN Classification
UN Hazard Class: 8; UN Pack Group: III 

STORAGE
Fireproof. Separated from incompatible materials. See Chemical Dangers. Cool. Well closed. Do not allow to dry out. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 
PACKAGING
Do not transport with food and feedstuffs.
Marine pollutant. 
HYDROXYLAMINE (50% aqueous solution) ICSC: 1747
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS SOLUTION IN WATER. 

Physical dangers
 

Chemical dangers
Decomposes violently on heating. This generates explosion and toxic hazard. The substance is a weak base. Reacts violently with oxidants, metals such as finely divided zinc, some metal oxides, copper(II)sulfate and phosphorus chlorides. This generates fire and explosion hazard. Attacks metals such as aluminium, copper, tin and zinc. 

Formula: H3NO / NH2OH
Molecular mass: 33.0
Boiling point: 107°C
Melting point: 8°C
Density (at 20°C): 1.12 g/cm³
Vapour pressure, kPa at 20°C: 1.4
Auto-ignition temperature: 215°C  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is corrosive to the eyes. The substance is irritating to the skin and respiratory tract. The substance may cause effects on the blood. This may result in the formation of methaemoglobin. The effects may be delayed. Medical observation is indicated. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the blood. This may result in the formation of methaemoglobin and consequent anaemia. Tumours have been detected in experimental animals but may not be relevant to humans. 


OCCUPATIONAL EXPOSURE LIMITS
MAK: sensitization of skin (SH) 

ENVIRONMENT
The substance is very toxic to aquatic organisms. 

NOTES
Do NOT take working clothes home.
Depending on the degree of exposure, periodic medical examination is suggested.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Decomposition during storage may cause a build-up of pressure in the container.
See ICSC 661. 

ADDITIONAL INFORMATION
  EC Classification
H290; H302; H312; H315; H318; H317; H335; H351; H373; H400 

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