Sodium nitrite
Sodium nitrite (CAS: 7632-00-0), with the linear formula NaNO₂, is a chemical compound and an essential inorganic salt. It is a white to slightly yellowish crystalline powder that is readily soluble in water. Sodium nitrite serves as a crucial reagent in various chemical syntheses and industrial processes, notably in the production of dyes and as a corrosion inhibitor. Its oxidizing properties also lend it to applications in heat treatment and as a laboratory reagent.
Dye Synthesis
Sodium nitrite is extensively used in the synthesis of azo dyes through diazotization reactions. This process is fundamental in the textile and pigment industries, providing vibrant colours.
Corrosion Inhibition
It acts as an effective corrosion inhibitor, particularly for ferrous metals in aqueous systems. This application is common in industrial cooling systems and antifreeze formulations.
Chemical Synthesis Reagent
As an oxidizing agent and a source of the nitroso group, sodium nitrite is a versatile reagent in organic synthesis, including the conversion of amines to diazonium salts.
Heat Treatment
Sodium nitrite can be employed in the heat treatment of metals, contributing to surface hardening and the creation of specific metallurgical properties.
| Molecular weight | 69.00 |
|---|---|
| Linear formula | NaNO2 |
| Assay | ≥97.0% |
| Grade | ACS reagent |
| Density | 1.29 g/mL at 25 °C |
| Concentration | 40 wt. % in H2O |
| Autoignition temp | 914 °F |
| Melting point | 271 °C(lit.) |
| Loss on drying | ≤0.2% loss on drying, 4 h (on silica gel)≤0.25% loss on drying (on vacuum) |
| Impurities tested | ≤0.01% insolubles |
| Suitability | complies for appearance of solution |
Hazard statements
- H272May intensify fire; oxidiser
- H301Toxic if swallowed
- H319Causes serious eye irritation
- H400Very toxic to aquatic life
Precautionary statements
- P220Keep away from clothing and combustible materials
- P273Avoid release to the environment
- P301IF SWALLOWED
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 1500 5.1/PG 3 |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | O,T,N |
| Risk statements (R) | 8-25-50 |
| Safety statements (S) | 45-61 |
| Cation traces | Ca: ≤0.01%Fe: ≤0.001%K: ≤0.005%heavy metals (as Pb): ≤0.001% |
| Anion traces | chloride (Cl-): ≤0.005%sulfate (SO42-): ≤0.01% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Sodium Nitrite (CAS: 7632-00-0) used for?
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Sodium nitrite (CAS: 7632-00-0) is used in dye synthesis, as a corrosion inhibitor, in chemical synthesis, and in the heat treatment of metals.
What is the CAS number and formula for Sodium Nitrite?
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The CAS number for Sodium Nitrite is 7632-00-0, and its linear formula is NaNO₂.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Sodium Nitrite in ACS reagent grade with an assay of ≥97.0%. TSS does not represent this product as USP, BP, or EP grade.
How should Sodium Nitrite be handled safely?
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Sodium nitrite is an oxidizer, toxic if swallowed, causes serious eye irritation, and is very toxic to aquatic life. Handle with appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection. Avoid release to the environment. Refer to the Safety Data Sheet for comprehensive handling information.
Is Sodium Nitrite packed and exported by TSS?
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Yes, Tech Serve Solutions packs and exports Sodium Nitrite.
How can I request a sample or quote for Sodium Nitrite?
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To request a sample or a quote for Sodium Nitrite, please contact the Tech Serve Solutions sales team via our website or by phone.
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