Agent Name

Trichloroisocyanuric acid

Alternative Name


CAS Number




Major Category

Other Uses


Symclosene; 1,3,5-Triazine, 2,4,6(1H,3H,5H)-trione, 1,3,5-trichloro-; 1,3,5-Trichloro-2,4,6-trioxohexahydro-s-triazine; 1,3,5-Trichloro-s-triazine-2,4,6(1H,3H,5H)-trione; 1,3,5-Trichloro-s-triazinetrione; 1,3,5-Trichloroisocyanuric acid; Chloreal; Fi Clor 91; Fichlor 91; Isocyanuric chloride; Kyselina trichloisokyanurova [Czech]; N,N',N"-Trichloroisocyanuric acid; Neochlor 90; Sincloseno [INN-Spanish]; Symclosen; Symclosene; Symclosenum [INN-Latin]; Trichlorinated isocyanuric acid; Trichlorisocyanursaeure; Trichloro-s-triazine-2,4,6(1H,3H,5H)-trione; Trichloro-s-triazinetrione; Trichlorocyanuric acid; Trichloroisocyanurate; s-Triazine-2,4,6(1H,3H,5H)-trione, 1,3,5-trichloro-; [ChemIDplus] TCC; TCCA; [CHEMINFO] UN2468




White solid; [ICSC] Strong odor of chlorine; Slightly hygroscopic; [HSDB]


Used in swimming pool sanitizers, industrial deodorants, bleaches, scouring powders, and dishwashing compounds; [HSDB] Used as a disinfectant, chlorinating agent, stainless steel cleaner, and non-shrink agent for wool; [Merck Index]


Forms hypochlorous acid on contact with water; A moderate skin, eye, and mucous membrane irritant; [Merck Index] A strong oxidant that reacts violently with combustible substances; Decomposed by water forming hypochloric acid and cyanuric acid; A mild skin irritant; A severe eye and respiratory tract irritant; Inhalation of dust or decomposition products may cause pulmonary edema; [ICSC] Irritating to skin, eyes, and respiratory tract; Estimated lethal oral dose = 1 ounce to 1 pint for a 150 lb. person; Oral LD50 (rat) = 406 mg/kg; Skin LD50 (rabbit) = 20,000 mg/kg; [HSDB] A strong oxidizing agent; May react with water producing chlorine gas; May cause skin and eye irritation; [CAMEO] A skin, eye, and respiratory tract irritant; May cause corrosive injuries on prolonged contact with skin and eyes; [CHEMINFO] A skin irritant; Corrosive to eyes; [eChemPortal: ERMA] An eye and respiratory tract irritant; [eChemPortal: ESIS] An oxidizing agent; May cause fire on contact with combustible material; An irritant; May cause corrosive injuries; [MSDSonline] See "Sodium cyanurate" and "Sodium dichloroisocyanurate."

Reference Link

EPA Pesticide Chemical Search

Exposure Assessment
Vapor Pressure

1.25E-7 mm Hg

Lethal Concentration

LC (rat) > 2,000 mg/m3/1h

Adverse Effects
Toxic Pneumonitis



Skin Burns

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Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


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