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Potassium Nitrate - White or colorless transparent crystalline - CAS 7757-79-1 - Image 1
Nitrates

Potassium Nitrate

CAS Number

7757-79-1

Molecular Formula

KNO₃

HS Code

2834210000

EINECS Number

231-818-8

UN Number

1486

Hazard Class

5.1

Appearance

White or colorless transparent crystalline

Properties

White or colorless transparent crystalline, relative molecular mass 101.10, specific gravity: 2.109, melting point 334°C, decomposition temperature 400°C. Odorless, cooling and salty taste. Soluble in water, slightly soluble in ethanol and glycerol. Strong oxidizer.

High-purity potassium nitrate (KNO₃), white or colorless transparent crystalline. Widely used in fertilizers, glass manufacturing, and industrial applications. Reference method: GB/T 20784-2018.
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Specifications

Total Nitrogen (N): 13% min
Potassium (K₂O): 46% min
Moisture: 0.4% max
Water Insoluble: 0.2% max
pH (10%): 6-8
Packaging: 25kg/50kg bags

Applications

• Fertilizer industry - High-efficiency potassium and nitrogen fertilizer
• Glass and ceramics manufacturing - Clarifying agent, flux
• Food preservation - Curing agent for meat products
• Pyrotechnics - Oxidizer
• Heat treatment salts - Metal hardening

Quality Standards

Description Unit Specification Typical Analysis
Total Nitrogen (N) Wt-% 13 Min 13.83
Potassium (K₂O) Wt-% 46 Min 46.58
Moisture (H₂O) Wt-% 0.4 Max 0.10
Water Insoluble Wt-% 0.2 Max 0.04
pH (10%) -- 6-8 6.2
Chloride (Cl) Wt-% 1.5 Max 0.1
Sodium (Na) Wt-% 1.5 Max 0.08
Arsenic (As) ppm 1 Max 0.1
Cadmium (Cd) ppm 1 Max 0.1
Lead (Pb) ppm 1 Max 3.96
Mercury (Hg) ppm 1 Max 0.013

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