Sodium dichloroisocyanurate

Sodium dichloroisocyanurate (INN: sodium troclosene, troclosenum natricum or NaDCC or SDIC) is a chemical compound widely used as a cleansing agent and disinfectant.[1] It is a colorless, water-soluble solid. The dihydrate is also known (51580-86-0 ) as is the potassium salt (2244-21-5 ).

Sodium dichloroisocyanurate

Names
IUPAC name Sodium 3,5-dichloro-2,4,6-trioxo-1,3,5-triazinan-1-ide
Other names Sodium dichloroisocyanurate, Sodium troclosene, Sodic troclosene
Identifiers
CAS Number	2893-78-9^Y 51580-86-0 (dihydrate)^Y
3D model (JSmol)	Interactive image
ChemSpider	451165^Y
ECHA InfoCard	100.018.880
PubChem CID	517121
RTECS number	XZ1900000
UNII	07M9U9U0LK^Y
CompTox Dashboard (EPA)	DTXSID3024994
InChI InChI=1S/C3HCl2N3O3.Na/c4-7-1(9)6-2(10)8(5)3(7)11;/h(H,6,9,10);/q;+1/p-1^Y Key: MSFGZHUJTJBYFA-UHFFFAOYSA-M^Y InChI=1S/C3HCl2N3O3.Na/c4-7-1(9)6-2(10)8(5)3(7)11;/h(H,6,9,10);/q;+1/p-1 Key: MSFGZHUJTJBYFA-REWHXWOFAV Key: MSFGZHUJTJBYFA-UHFFFAOYSA-M
SMILES [Na+].ClN1C(=O)[N-]C(=O)N(Cl)C1=O
Properties
Chemical formula	C3Cl2N3NaO3
Molar mass	219.95 g/mol (anhydrous) 255.98 g/mol (dihydrate)
Appearance	white, crystalline powder
Odor	chlorine-like
Density	0.7 g/cm^3 (as granules)
Melting point	225 °C (437 °F; 498 K)
Solubility in water	22.7 g/100 mL (25 °C)
Solubility in acetone	0.5 g/100 mL (30 °C)
Acidity (pKa)	6.2-6.8
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)	(Rat oral) 1670 mg/kg
Related compounds
Other cations	Potassium dichloroisocyanurate Calcium dichloroisocyanurate Lithium dichloroisocyanurate Barium dichloroisocyanurate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is ^YN ?)
Infobox references

Uses

It is mainly used as a disinfectant, biocide and industrial deodorant. It is found in some modern water purification tablets/filters. It is more efficient than the formerly used halazone water disinfectant. In these applications, it is a slow-release source of chlorine in low concentrations at a relatively constant rate. As a disinfectant, it is used to sterilize drinking water, swimming pools, tableware and air, and to fight against infectious diseases as a routine disinfection agent.

It can be used for disinfection and environmental sterilization, for example in livestock, poultry, fish and silkworm raising, for bleaching textiles, for cleaning industrial circulating water, and to prevent wool from shrinking.

In one notably interesting experiment, a concentrated solution of NaDCC and a dilute solution of copper (II) sulfate are mixed, producing an intense lilac precipitate of the complex salt sodium copper dichloroisocyanurate. The reactions between dichloroisocyanurate salts (Na, K, Li, Ba, Ca) and transition metal salts (Ni, Cu, Cd) are described in patent US 3'055'889. The overall reaction is:

CuSO₄ + 4 Na(C₃N₃O₃Cl₂) → Na₂[Cu(C₃N₃O₃Cl₂)₄] + Na₂SO₄

Sodium dichloroisocyanurate is used to show chemiluminescence as it emits red light upon decomposition by concentrated (130 vol, 35%) hydrogen peroxide.

See also

• Comet (cleanser)
• Dichloroisocyanuric acid (dichlor)
• Trichloroisocyanuric acid (trichlor)

References

1. Huthmacher, Klaus; Most, Dieter (2000). "Cyanuric Acid and Cyanuric Chloride". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a08_191. ISBN 3-527-30673-0..