Ammonia
ALDRICH/294993 - anhydrous, ≥99.98%
Synonym: Ammonia gas
CAS Number: 7664-41-7
Empirical Formula (Hill Notation): H3N
Molecular Weight: 17.03
EC Number: 231-635-3
MDL Number: MFCD00011418
Linear Formula: NH3
Product Type: Chemical
| assay | ≥99.98% |
| autoignition temp. | 1203 °F |
| bp | −33 °C (lit.) |
| density | 0.7 g/cm3 at -33 °C |
| expl. lim. | 25 % |
| form | liquefied gas |
| grade | anhydrous |
| greener alternative category | Enabling  , |
| greener alternative product characteristics | Design for Energy Efficiency Learn more about the Principles of Green Chemistry . |
| InChI | 1S/H3N/h1H3 |
| InChI key | QGZKDVFQNNGYKY-UHFFFAOYSA |
| mp | −78 °C (lit.) |
| pH | ~10-12 (20 °C, 50 g/L) |
| pKa (25 °C) | 9.25 |
| Quality Level | 200 |
| SMILES string | N |
| solubility | water: 531 g/L at 20 °C |
| sustainability | Greener Alternative Product |
| vapor density | 0.6 (vs air) |
| vapor pressure | 8.75 atm ( 21 °C) |
| Application: | Ammonia may be used as a base to adjust pH for preparing mixed magnetite-hematite nanoparticles via combustion method. These nanoparticles show promising potential as sorbents for removing heavy metal ions from water. |
| Application: | Anhydrous ammonia has been used in dynamic reaction cell technology (DRC) to remove interfering ions without the loss of sensitivity. It has also been used for adjusting pH during the synthesis of magnetite-hematite mixture by combustion methods. |
| Application: | Reagent for chemical vapor deposition of TiN. |
| General description: | We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here . |
| Legal Information: | Aldrich is a registered trademark of Sigma-Aldrich Co. LLC |
| Other Notes: | See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation |
| Packaging: | 170 g in steel cylinder |
| Packaging: | Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed. Compatible with the following:• Aldrich® lecture-bottle station systems • Aldrich® lecture-bottle gas regulators |
| Symbol |     GHS04,GHS05,GHS06,GHS09 |
| Signal word | Danger |
| Hazard statements | H280 - H314 - H331 - H410 |
| Precautionary statements | P260 - P273 - P280 - P303 + P361 + P353 - P304 + P340 + P311 - P305 + P351 + P338 + P310 |
| Hazard Codes | T,N |
| Risk Statements | 10-23-34-50 |
| Safety Statements | 9-16-26-36/37/39-45-61 |
| RIDADR | UN 1005 2.3(8) |
| WGK Germany | WGK 2 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Supplemental Hazard Statements | EUH071 |
| Purity | ≥99.98% |
| bp | −33 °C (lit.) |
| mp | −78 °C (lit.) |
| Density | 0.7 g/cm3 at -33 °C |
| UNSPSC | 12142100 |