Ammonia solution , ≥28%nh3inh2o, electronic level , 1336-21-6
Synonym(s):
Ammonia aqueous;Ammonia Solution;Ammonia water;Ammonium hydroxide solution;Ammonium hydroxide solution, Ammonia water
CAS NO.：1336-21-6
Empirical Formula: H5NO
Molecular Weight: 35.05
MDL number: MFCD00066650
EINECS: 215-647-6
PRODUCT Properties
| Melting point: | -77°C |
| Boiling point: | 36°C |
| Density | 0.91 g/mL at 20 °C |
| vapor density | 1.2 (vs air) |
| vapor pressure | 115 mmHg at 20 °C for 29% solution |
| storage temp. | 2-8°C |
| solubility | Water (Soluble) |
| form | Liquid, Single Sub-Boiling Quartz Distillation |
| pka | 9.3(at 25℃) |
| Specific Gravity | approximate 0.96 (10%, 15℃) |
| color | Colorless |
| Odor | Strong pungent ammonia odor detectable at 17 ppm |
| PH | 10.09(1 mM solution);10.61(10 mM solution);11.12(100 mM solution); |
| explosive limit | 27% |
| Water Solubility | Miscible with water. |
| λmax | λ: 260 nm Amax: 0.01 λ: 280 nm Amax: 0.01 |
| Merck | 14,494 |
| BRN | 3587154 |
| Stability: | Stable. Incompatible with copper, copper alloys, acids, galvanised iron, zinc, aluminium, bronze, dimethyl sulphate, mercury, alkali metals. |
| InChIKey | VHUUQVKOLVNVRT-UHFFFAOYSA-N |
| CAS DataBase Reference | 1336-21-6(CAS DataBase Reference) |
| EPA Substance Registry System | Ammonium hydroxide (1336-21-6) |
Description and Uses
Ammonium hydroxide is a colorless, liquid solution with a characteristic and pungent odor. It is ammonia combined with water. Ammonia (NH3) is a compound consisting of nitrogen and hydrogen. Both ammonia and ammonium hydroxide are very common compounds, found naturally in the environment (in air, water, and soil) and in all plants and animals, including humans. Ammonia is a source of nitrogen, an essential element for plants and animals. Ammonia is also produced by the human body – by our organs and tissues and by beneficial bacteria living in our intestines.
Ammonia plays an important role in protein synthesis in the human body. In brief summary, all living things need proteins, which are comprised of some 20 different amino acids. While plants and microorganisms can synthesize most amino acids from the nitrogen in the atmosphere, animals cannot. For humans, some amino acids cannot be synthesized at all and must be consumed as intact amino acids. Other amino acids, however, can be synthesized by microorganisms in the gastrointestinal tract with the help of ammonia ions. Thus, ammonia is a key player in the nitrogen cycle and in protein synthesis. Ammonia also helps maintain the body's pH balance.
Ammonium hydroxide is widely utilized as a leavening agent or acidity regulator in food production. It serves as a precursor to some alkyl amines and is also used in the tobacco industry for flavor enhancement and as a processing aid. During furniture making, it combines with tannic acid and is used to darken or stain wood by making it iron salts. In chemical laboratories, it used for qualitative inorganic analysis, as a complexant and as a base. It is used to clean gold, silve, and platinum jewelry. It is an active component of Tollens' reagent (consisting of a solution of silver nitrate and ammonia) and is used to determine the presence of aldehyde or alpha-hydroxy ketone functional groups.
Safety
| Symbol(GHS) |    GHS05,GHS07,GHS09 |
| Signal word | Danger |
| Hazard statements | H314-H335-H410 |
| Precautionary statements | P261-P271-P273-P280-P303+P361+P353-P305+P351+P338 |
| Hazard Codes | C,N |
| Risk Statements | 34-50-22 |
| Safety Statements | 26-36/37/39-45-61 |
| RIDADR | UN 2672 8/PG 3 |
| WGK Germany | 2 |
| RTECS | BQ9625000 |
| F | 34 |
| Autoignition Temperature | 690 °C (for ammonia) |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 28142000 |
| Hazardous Substances Data | 1336-21-6(Hazardous Substances Data) |
| Toxicity | LD50 oral (rat) 350 mg/kg PEL (OSHA) 35 ppm (27 mg/m3) TLV-TWA (ACGIH) 25 ppm (17 mg/m3) STEL (ACGIH) 35 ppm (27 mg/m3) |
