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NIOSH

HYDROXYLAMINE

ICSC: 0661

Oxammonium
H3NO / NH2OH
Molecular mass: 33.0
ICSC # 0661 		CAS # 7803-49-8
RTECS # NC2975000
EC # 612-122-00-7
October 27, 1995 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Explodes on heating. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking. NO contact with hot surfaces.
Water in large amounts, alcohol-resistant foam, powder.
EXPLOSION Risk of fire and explosion on contact with many substances (see Chemicals Dangers).

In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position.
EXPOSURE
AVOID ALL CONTACT!

•INHALATION Blue lips or finger nails. Blue skin. Cough. Dizziness. Headache. Sore throat. Weakness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention. See Notes.
•SKIN MAY BE ABSORBED! Redness. Pain (Further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
•EYES Redness. Pain. Severe deep burns.
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Nausea. Shortness of breath. Vomiting. See Notes (Further see Inhalation).
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention. See Notes.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: P2 filter respirator for harmful particles. Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place.
Fireproof. Separated from incompatible materials . See Chemical Dangers. Cool. Dry. Well closed.

Xn symbol
N symbol
R: 5-22-37/38-41-43-48/22-50
S: 2-22-26-36/37/39-61
ICSC: 0661 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

HYDROXYLAMINE

ICSC: 0661

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
VERY HYGROSCOPIC WHITE NEEDLES OR FLAKES.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
May explode on heating above 70°C or when exposed to open flame. The substance decomposes rapidly at room temperature, especially in presence of moisture and carbon dioxide, and violently on heating producing toxic fumes including nitrogen oxides . The solution in water is a weak base. Reacts violently with oxidants, metals such as finely divided zinc, some metal oxides, copper(II)sulfate and phosphorus chlorides causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK: sensitization of skin (Sh); (DFG 2005).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the skin and the respiratory tract , and is corrosive to the eyes. The substance may cause effects on the blood , resulting in formation of methaemoglobin. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the blood , resulting in formation of methaemoglobin and the consequent anaemia.

PHYSICAL
PROPERTIES

Decomposes below boiling point at <70°C
Melting point: 33°C
Relative density (water = 1): 1.2
Solubility in water, g/100 ml at 20°C:
good
Vapour pressure, kPa at 47°C: 1.3
Relative vapour density (air = 1): 1.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flash point: explodes at 129°C
Auto-ignition temperature: 265°C
Octanol/water partition coefficient as log Pow: -1.5

ENVIRONMENTAL
DATA

The substance is very toxic to aquatic organisms.

N O T E S

Depending on the degree of exposure, periodic medical examination is indicated. The symptoms of nausea, vomiting and cyanosis do not become manifest until several hours have past. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. The relation between odour and the occupational exposure limit cannot be indicated. Decomposition during storage may cause a build-up of pressure in the container. Also consult ICSC # 0709 Hydroxylamine hydrochloride. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification.
NFPA Code: H2; F0; R3.

ADDITIONAL INFORMATION



ICSC: 0661 HYDROXYLAMINE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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