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Chemical Datasheet

SODIUM THIOCYANATE SOLUTION (56% OR LESS)

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 540-72-7
 none data unavailable
  • STS
NIOSH Pocket Guide International Chem Safety Card
none
  • SODIUM THIOCYANATE
NFPA 704
data unavailable
General Description
Odorless clear to pale yellow liquid. (USCG, 1999)

Hazards

Reactivity Alerts
none
Air & Water Reactions
No rapid reaction with air. No rapid reaction with water.
Fire Hazard
Special Hazards of Combustion Products: Irritating oxides of sulfur and nitrogen may form in fire. (USCG, 1999)
Health Hazard
Intensity of effects will vary with concentration of the solution. Inhalation of vapor causes irritation of nose and throat. Ingestion of large doses causes vomiting, extreme cerebral excitement, convulsions, and death in 10-48 hrs.; chronic poisoning can cause flu-like symptoms, skin rashes, weakness, fatigue, vertigo, nausea, vomiting, diarrhea, confusion. Contact with eyes causes irritation. Prolonged contact with skin may produce various skin eruptions, dizziness, cramps, nausea, and mild to severe disturbance of the nervous system. (USCG, 1999)
Reactivity Profile
Nitric acid violently oxidized a thiocyanate solution [Bretherick 1979 p. 121]. Caution should be exercised in treating a thiocyanate with an oxidizing agent such as a peroxide or chlorate as such mixtures have been known to explode. Special Hazards of Combustion Products: Irritating oxides of sulfur and nitrogen may form in fire (USCG, 1999). Carbonyl sulfide is produced in a violent reaction by the mixture of sulfuric acid and sodium thiocyanate.
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation
No information available.
Firefighting
Fire Extinguishing Agents: Use extinguishing agents appropriate for the surrounding fire. (USCG, 1999)
Non-Fire Response
No information available.
Protective Clothing
Rubber or plastic gloves; splash-proof goggles; rubber or plastic apron. (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Call for medical aid.

INHALATION: Move to fresh air.

INGESTION: Consult physician; hemodialysis is recommended as the treatment of choice.

EYES or SKIN: Flush with water for 15 min. (USCG, 1999)

Physical Properties

Chemical Formula:
  • NaCNS (aqueous)
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: data unavailable
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: data unavailable
Boiling Point: data unavailable
Molecular Weight: 81.08 (USCG, 1999)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: data unavailable

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Sodium isothiocyanate; (Thiocyanic acid, sodium salt) (540-72-7) 0.7 mg/m3 7.7 mg/m3 46 mg/m3
(DOE, 2024)

Regulatory Information

EPA Consolidated List of Lists

No regulatory information available.

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names