Sodium thiocyanate

Description

Sodium thiocyanate · CAS 540-72-7 · NaSCN. UNII 5W0K9HKA05. Melting Point: 572 °F (USCG, 1999); Melting Point: ~300 °C; Melting Point: 287 °C.

Identification

CAS Registry Number	540-72-7
PubChem CID	516871
Molecular formula	NaSCN
IUPAC name	sodium thiocyanate
UNII (FDA)	5W0K9HKA05

Computed Descriptors

Molecular Weight	81.07
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	80.96491446
Monoisotopic Mass	80.96491446
Topological Polar Surface Area	24.8
Heavy Atom Count	4
Formal Charge	0
Complexity	34.5

Physical & Chemical Properties

Melting Point	572 °F (USCG, 1999)
Melting Point	~300 °C
Melting Point	287 °C
Density	1.7 g/cm³
Vapor Pressure	0.00000004 [mmHg]
Decomposition	368 °C

Physical description & handling notes

• Sodium thiocyanate is an odorless white solid. Sinks and mixes with water. (USCG, 1999)
• Sodium thiocyanate solution (56% or less) is an odorless clear to pale yellow liquid. (USCG, 1999)
• CBI; Large Crystals; Dry Powder
• Colorless or white deliquescent solid; [Merck Index] Colorless odorless solid; [Aldrich MSDS]
• COLOURLESS HYGROSCOPIC CRYSTALS OR WHITE POWDER.
• Solubility in water, g/100ml at 21 °C: 139

Regulatory Status

Regulatory & Food Contact	FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS PRESERVATIVE: Food Additives Intended for use in the lactoperoxidase system. The lactoperoxidase system is used in fresh cheese including m Scientific procedures At the notifier's request, FDA ceased to evaluate this notice (in PDF) Taradon Laboratory

GHS Hazard Classification

Reported hazard statements	H302, H312, H332 (38.3%), H318 (36.5%), H319 (15.3%), H412 (85.4%), H372

Documented Uses

• Used to make other thiocyanates; [Merck Index] Used as preservative for foods; [WHO JECFA]
• Food Additives -> PRESERVATIVE -> JECFA Functional Classes
• Not Known or Reasonably Ascertainable
• 2023: 10,000,000 - <25,000,000 lb
• 2022: 10,000,000 - <25,000,000 lb
• 2021: 10,000,000 - <25,000,000 lb

Synonyms

SODIUM THIOCYANATE; 540-72-7; Sodium rhodanate; Sodium rhodanide; Thiocyanate sodium; Sodium sulfocyanate; Thiocyanic acid, sodium salt; Scyan; NaSCN; Haimased; Natrium rhodanatum; Natrium thiocyanat; Sodium thiocyanide; Sodium sulfocyanide; Natriumrhodanid; DTXSID4021343

Frequently Asked Questions

What are the CAS number and molecular formula of Sodium thiocyanate?

CAS 540-72-7; molecular formula NaSCN; molecular weight — g/mol.

What other names is Sodium thiocyanate known by?

SODIUM THIOCYANATE, 540-72-7, Sodium rhodanate, Sodium rhodanide, Thiocyanate sodium, Sodium sulfocyanate.

What is the regulatory status of Sodium thiocyanate?

Documented regulatory listings: FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; PRESERVATIVE: Food Additives; Intended for use in the lactoperoxidase system. The lactoperoxidase system is used in fresh cheese including m.

Is Sodium thiocyanate classified as hazardous?

Hazard statements reported: H302, H312, H332, H318, H319.

What are the key physical properties of Sodium thiocyanate?

Melting Point: 572 °F (USCG, 1999); Melting Point: ~300 °C; Melting Point: 287 °C; Density: 1.7 g/cm³.

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.