| IUPAC name
| Other names
|Molar mass||261.918 g/mol|
|Melting point||450 °C (842 °F; 723 K) (decomposes)|
|10 g/100 ml (20 °C)|
|Vapor pressure||~0 mmHg|
|Safety data sheet||LabChem|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
| 43 mg/kg (mouse, oral)|
300 mg/kg (rat, oral)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Sodium nitroprusside or SNP is a chemical compound, often encountered as dihydrate. It is sold under the brand name Nitropress among others as a medication used to lower blood pressure.
Sodium nitropruside decomposes to sodium ferrous ferrocyanide, sodium ferrocyanide, nitric oxide, and cyanogen at about 450 °C.
It decomposes in aqueous acid to liberate hydrogen cyanide (HCN).
Sodium nitropruside is a dark red solid, soluble in water.
It is sold by lab suppliers.
Sodium nitroprusside can be synthesized by digesting a solution of potassium ferrocyanide in water with nitric acid, followed by neutralization with sodium carbonate
- Detection of methyl ketones, amines, and thiols
Sodium nitroprusside has low toxicity.
Sodium nitroprusside should be kept in plastic bottles.
Can be neutralized with bleach.