Ammonia
CAS 7664-41-7
EC 231-635-3
Formula H3N
MW 17.03 g/mol
Alkalis & Bases Agriculture & FeedWater TreatmentPulp & PaperOil, Gas & EnergyTextile, Leather & PaperPharmaceuticals & HealthcareMining & MetalsPlastics & Polymers pH Regulation & BufferingCleaning & Degreasing
Description
Ammonia (CAS 7664-41-7, EC 231-635-3, formula H3N) is a strongly alkaline inorganic compound, also known by the refrigerant designation R-717 and the systematic name azane. It carries no E-code designation and is classified under HS code 28141000 within the alkalis and bases category.
In water treatment, ammonia reacts with chlorine to form chloramines, providing a more stable disinfection residual across distribution networks. In agriculture, it serves as a direct nitrogen source in fertiliser production, where it is neutralised with acids to produce ammonium salts. Textile and leather processors use it to adjust bath pH, controlling dye uptake and fibre swelling.
Ammonia is available in anhydrous and aqueous (solution) grades, with pharmaceutical-grade material conforming to Ph.Eur. specifications and technical grades supplied under REACH compliance. It is typically packaged in pressurised cylinders, ISO tanks, or bulk tankers depending on concentration and volume requirements.
In water treatment, ammonia reacts with chlorine to form chloramines, providing a more stable disinfection residual across distribution networks. In agriculture, it serves as a direct nitrogen source in fertiliser production, where it is neutralised with acids to produce ammonium salts. Textile and leather processors use it to adjust bath pH, controlling dye uptake and fibre swelling.
Ammonia is available in anhydrous and aqueous (solution) grades, with pharmaceutical-grade material conforming to Ph.Eur. specifications and technical grades supplied under REACH compliance. It is typically packaged in pressurised cylinders, ISO tanks, or bulk tankers depending on concentration and volume requirements.
Physical Properties
| Melting Point | -77.7 °C |
| Boiling Point | -33.35 °C |
| Density | 0.7 g/cm³ @ Temp: -33 °C |
| Flash Point | 52 °F |
| Appearance | Ammonia is a colorless, strongly alkaline, and extremely soluble gas with a pungent, suffocating odor. |
| Color | Colorless |
| Odor | Intense pungent odor detectable at 17 ppm |
| Form | Liquid |
| Water Solubility | soluble |
| Vapor Pressure | 8.75 atm ( 21 °C) |
| pH | pKa1= 9.461(25℃) |
| Log P | 0.23 at 20℃ |
Safety & Handling (Learn More)
Danger GHS04 GHS05 GHS06 GHS09 GHS07 GHS02 GHS08
H
H220H221H280H302H314H318H331H332H334H335H341H370H372H373H400H402H410H411
P
P203P210P222P233P260P261P264P270P271P273P280P284P316P317P318P319P321P330P363P377P381P391P403P405P501P264+P265P301+P317P304+P340P308+P316P342+P316P403+P233P410+P403P301+P330+P331P302+P361+P354P305+P354+P338
Trade & Regulatory
| HS Code | 28141000 |
| UN Number | 1219 |
| ADR Class | 3 |
| Packing Group | II |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 2 |
Other Names
azaneammineammonia gasr717R-717R 717am-folamoniak
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Raw Materials
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