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NIOSH

TRICHLOROISOCYANURIC ACID

ICSC: 1675

1,3,5-Trichloro-s-triazine-2,4,6(1H,3H,5H)-trione
Symclosene
Trichloro-s-triazinetrione
C3Cl3N3O3
Molecular mass: 232.4
ICSC # 1675 		CAS # 87-90-1
RTECS # XZ1925000
UN # 2468
EC # 613-031-00-5
April 20, 2007 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire.
NO contact with combustibles.
Water in large amounts. Foam. Dry powder.
EXPLOSION Risk of explosion when heated and on contact with combustible substances and other substances (see Chemical Dangers).

In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.
EXPOSURE
STRICT HYGIENE!

•INHALATION Cough. Sore throat. Laboured breathing.
Local exhaust or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
•SKIN Redness.
Protective gloves.
First rinse with plenty of water, then remove contaminated clothes and rinse again.
•EYES Redness. Pain. Burns
Safety goggles .
First rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention.
•INGESTION Abdominal pain. Burning sensation. 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 for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: particulate filter adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable, dry containers. Carefully collect remainder, then remove to safe place.
Dry. Well closed. Separated from amines , combustible and reducing substances. See Chemical Dangers. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.

O symbol
Xn symbol
N symbol
R: 8-22-36/37-31-50/53
S: 2-8-26-41-60-61
UN Hazard Class: 5.1
UN Packing Group: II
Signal: Danger
Flam circle-Corr-Skull-Enviro
May intensify fire; oxidizer
Harmful if swallowed
Fatal if inhaled dust
Causes mild skin irritation
Causes serious eye damage
Very toxic to aquatic life
ICSC: 1675 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.

TRICHLOROISOCYANURIC ACID

ICSC: 1675

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PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALLINE POWDER , WITH PUNGENT ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes . May explode on heating. The substance is a strong oxidant and reacts violently with combustible and reducing materials. Reacts violently with ammonia, ammonium salts and amines, sodium carbonate (soda ash) causing fire and explosion hazard. Reacts with strong acids producing toxic gas (chlorine; see ICSC 0126). sing

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body in hazardous amounts by inhalation and by ingestion.

INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly when dispersed .

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is severely irritating to the eyes and the respiratory tract and is mildly irritating to the skin . Corrosive on ingestion. Inhalation of the dust may cause lung oedema (see Notes).

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Decomposes at >225°C
Density: 2.07
g/cm3
Solubility in water, g/100 ml at 25°C: 1.2
Vapour pressure, Pa at °C: negligible
Octanol/water partition coefficient as log Pow: 0.26

ENVIRONMENTAL
DATA

The substance is very toxic to aquatic organisms. It is strongly advised that this substance does not enter the environment.

N O T E S

The substance decomposes in water producing hypochloric acid and cyanuric acid. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. See ICSC 1313 (Cyanuric acid).
Transport Emergency Card: TEC (R)-51GO2-I+II+III

NFPA Code: H2; F0; R2; ox

ADDITIONAL INFORMATION



ICSC: 1675 TRICHLOROISOCYANURIC ACID
(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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