Cyanuric acid

Description

Cyanuric acid is identified by CAS 108-80-5, molecular formula C3H3N3O3 and molecular weight 129.02 g/mol. UNII H497R4QKTZ; ChEBI 17696; InChIKey ZFSLODLOARCGLH-UHFFFAOYSA-N. Melting Point: 360 °C; Solubility: 0.5 mL (NTP, 1992); Solubility: Solubility in 96% H2SO4 (25 °C): 14.1%.

Identification

CAS Registry Number	108-80-5
PubChem CID	7956
Molecular formula	C3H3N3O3
Molecular weight	129.02 g/mol
IUPAC name	1,3,5-triazinane-2,4,6-trione
InChIKey	ZFSLODLOARCGLH-UHFFFAOYSA-N
UNII (FDA)	H497R4QKTZ
ChEBI ID	CHEBI:17696

Computed Descriptors

Molecular Weight	129.07
XLogP3	-1.2
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	129.01744097
Monoisotopic Mass	129.01744097
Topological Polar Surface Area	87.3
Heavy Atom Count	9
Formal Charge	0

Physical & Chemical Properties

Melting Point	360 °C
Solubility	0.5 mL (NTP, 1992)
Solubility	Solubility in 96% H2SO4 (25 °C): 14.1%
Solubility	2 mg/mL at 25 °C
Density	2.5 g/cm³
Density	1.75 @25 °C
Vapor Pressure	0.00000003 [mmHg]
LogP	-0.47

Physical description & handling notes

• Crystals. (NTP, 1992)
• Dry Powder; Large Crystals; Liquid; Dry Powder; Other Solid; Large Crystals; Dry Powder; Wet Solid; CBI
• White, odorless solid; [Hawley] Hygroscopic; [CHEMINFO] Off-white powder; [MSDSonline]
• Solid
• ODOURLESS WHITE HYGROSCOPIC CRYSTALLINE POWDER.
• White crystalline solid

Regulatory Status

Regulatory & Food Contact	FDA Cumulative Estimated Daily Intake (CEDI): FCS
GHS notification summary	73.2% (208 / 284)

GHS Hazard Classification

GHS notification summary	73.2% (208 / 284)
Reported hazard statements	H319 (26.8%)

Documented Uses

• Used in labs as a source of cyanic acid gas and in swimming pools as a disinfectant; Also used to make melamine, sponge rubber, herbicides, dyes, resins, scouring powders, household bleaches, institutional and industrial cleansers, automatic dishwasher compounds, general sanitizers, and antimicrobial agents; [HSDB]
• Using Disinfectants or Biocides [Category: Clean]
• Cyanuric acid is a selective molluscicide. /Former/
• Convenient lab source of cyanic acid gas. In preparation of melamine, sponge rubber, herbicides, dyes resins, antimicrobial agents. As stabilizer and disinfectant in swimming pool water.
• For more Uses (Complete) data for CYANURIC ACID (6 total), please visit the HSDB record page.
• Plastics -> Polymer Type -> Polyolefin-I; Polyolefin-II

Synonyms

CYANURIC ACID; 108-80-5; 1,3,5-Triazine-2,4,6-triol; Isocyanuric acid; Trihydroxycyanidine; Tricyanic acid; 1,3,5-triazinane-2,4,6-trione; sym-Triazinetriol; Pseudocyanuric acid; Isocyanurate acid; 1,3,5-Triazine-2,4,6(1H,3H,5H)-trione; 2,4,6-Trihydroxy-1,3,5-triazine; s-Triazine-2,4,6-triol; Kyselina kyanurova; s-2,4,6-Triazinetriol; Trihydroxytriazine

Frequently Asked Questions

What are the CAS number and molecular formula of Cyanuric acid?

CAS 108-80-5; molecular formula C3H3N3O3; molecular weight 129.02 g/mol.

What other names is Cyanuric acid known by?

CYANURIC ACID, 108-80-5, 1,3,5-Triazine-2,4,6-triol, Isocyanuric acid, Trihydroxycyanidine, Tricyanic acid.

What is the regulatory status of Cyanuric acid?

Documented regulatory listings: FDA Cumulative Estimated Daily Intake (CEDI): FCS.

Is Cyanuric acid classified as hazardous?

73.2% of GHS notifications report no hazard classification (208 of 284).

What are the key physical properties of Cyanuric acid?

Melting Point: 360 °C; Solubility: 0.5 mL (NTP, 1992); Solubility: Solubility in 96% H2SO4 (25 °C): 14.1%; Solubility: 2 mg/mL at 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.