Sodium ferrocyanide
CAS Number
13601-19-9
EC Number
237-081-9
E Number
E535
What is Sodium ferrocyanide?
Sodium ferrocyanide (CAS 13601-19-9), also known commercially as E535 and tetrasodium hexacyanoferrate, is an inorganic iron-cyanide salt used in food processing and industrial water treatment.
Where is Sodium ferrocyanide used?
- Food and salt processing: anti-caking agent preventing clumping in table salt
- Mineral salts: flowability at regulated dosage levels
- Water treatment: sequesters heavy metals and controls corrosion in distribution systems and cooling circuits
- Mining and metallurgy: metal separation and precipitation with controlled iron-cyanide chemistry
- Textile and leather processing: stabilizer, reducing agent in dyebath formulations and tanning auxiliaries
Good to know: Purity levels and moisture content are key specification parameters buyers should confirm with suppliers.
Commercial specifications
- Food-grade material to E535 specifications and FCC standards
- Technical-grade product for water treatment and mining where high purity is still essential
Other Names (Synonyms)
tetrasodium hexacyanoferrate|sodium hexacyanoferrate(II)|Natriumhexazyanoferrat(II)|Na4[Fe(CN)6]|sodium hexacyanoferrate(4-)|Sodium prussiate yellow|Tetrasodium ferrocyanide|Sodium hexacyanoferate(II)|E535
What are the physical properties of Sodium ferrocyanide?
Melting Point 82°C -10H₂O
Density 1.46 g/cm³
Appearance solid
Color yellow monoclinic crystals, crystalline
Form yellow monoclinic crystals
Water Solubility soluble
Log P -0.250 (est)
How is Sodium ferrocyanide classified and handled safely? Learn More
Warning
GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H312 Harmful in contact with skin
H412 Harmful to aquatic life with long lasting effects
H302+H312 Harmful if swallowed or in contact with skin
Precautionary Statements
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to Sodium ferrocyanide?
UN Number 1588
Storage Class 13 - Non Combustible Solids
WGK (Germany) 2