Salts & Minerals
REACH
Calcium nitrite
CAS Number
13780-06-8
EC Number
237-424-2
What is Calcium nitrite?
Calcium nitrite (CAS 13780-06-8) is an inorganic calcium salt used industrially as a corrosion inhibitor and accelerating admixture in construction and infrastructure.
Where is Calcium nitrite used?
- Reinforced concrete: admixture extending service life
- Bridges, parking decks, marine infrastructure and below-grade foundations in chloride-rich environments
- Precast concrete: shortens demolding cycles by accelerating cement hydration at lower temperatures
- Oil and gas well cementing: set accelerator under cold downhole conditions
- Mining: grouting operations and corrosion protection treatments for steel ground support elements
- It protects embedded steel reinforcement from chloride-induced corrosion while accelerating early concrete strength development.
Good to know: Occasionally referenced under Caswell No. 147 in regulatory contexts.
Commercial specifications
- Aqueous solution at 30% and 35% concentrations
- Solid formats preferred where liquid handling or freight costs are a constraint
Other Names (Synonyms)
calcium dinitrite|Nitrous acid, calcium salt|Caswell No. 147|Nitrous acid calcium salt (2:1)|EPA Pesticide Chemical Code 076202|F538343O0T|Calcium nitrite (Ca(NO2)2)
What are the physical properties of Calcium nitrite?
Melting Point 390 °C
Density 2.23
Flash Point 110 °C
Color white-yellow hexagonal, hexane crystals, crystalline; hygroscopic
Odor Odorless
Form white-yellow hexagonal crystals
Water Solubility slightly soluble alcohol [MER06]; g/100g solution H2O: 38.3 (0°C), 43.0 (18.5°C), 71.2 (91°C); solid phase Ca(NO2)2 · 4H2O (0°C, 18.5°C), Ca(NO2)2 ·2H2O (91°C) [KRU93]
Refractive Index n 20/D 1.3946
Log P -2.52 at 20℃
How is Calcium nitrite classified and handled safely? Learn More
Danger
GHS03· Oxidizing GHS05· Corrosive GHS06· Toxic GHS07· Irritant GHS09· Environmental Hazard GHS08· Health Hazard
Hazard Statements
H272 May intensify fire; oxidizer
H301 Toxic if swallowed
H302 Harmful if swallowed
H318 Causes serious eye damage
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P220 Keep away from clothing and other combustible materials.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
Which trade and regulatory codes apply to Calcium nitrite?
Storage Class 10 - Combustible liquids
WGK (Germany) 3