| Identification | More | [Name]
Ammonium hypophosphite | [CAS]
7803-65-8 | [Synonyms]
AMMONIUM HYPOPHOSPHITE
AMMONIUM PHOSPHINATE
hypophosphorousacid,ammoniumsalt
AMMONIUM HYPOPHOSPHITE EXTRA PURE
Phosphinic acid, ammonium salt
AMMONIUM HYPOPHOSPHITE, 97%, FOR ANALYSIS
Ammonium hypophosphite, for analysis | [EINECS(EC#)]
232-266-0 | [Molecular Formula]
H4NO2P | [MDL Number]
MFCD00050356 | [Molecular Weight]
81.01 | [MOL File]
7803-65-8.mol |
| Chemical Properties | Back Directory | [Appearance]
white crystals | [Melting point ]
155-160 °C
| [density ]
1.634 [CRC10] | [solubility ]
very soluble in H2O; slightly soluble in ethanol; insoluble in acetone | [form ]
white hygroscopic crystals | [color ]
white hygroscopic crystals, crystalline | [Water Solubility ]
1000 g/L | [Merck ]
13,530 | [InChI]
1S/H3N.H3O2P/c;1-3-2/h1H3;1-3H | [InChIKey]
ZRDXIILBYDTYOA-UHFFFAOYSA-N | [SMILES]
N.OPO | [CAS DataBase Reference]
7803-65-8(CAS DataBase Reference) | [EPA Substance Registry System]
7803-65-8(EPA Substance) |
| Questions And Answer | Back Directory | [Preparation]
1. One-step method: This method involves the direct reaction of yellow phosphorus with ammonia. However, the reaction conditions are difficult to control, often resulting in the formation of ammonium hypophosphite as a byproduct. Furthermore, this method produces toxic PH3 gas, which is flammable in air and extremely dangerous.
2. Neutralization method: Passing ammonia gas into high-purity hypophosphite produces an ammonium hypophosphite solution, which is then evaporated and crystallized to obtain the final product. This method is more complex in its operational steps.
3. Adding ammonium carbonate, an ammonium salt containing an anion that can be precipitated by calcium ions, to a calcium hypophosphite solution produces an ammonium hypophosphite solution. This solution is then concentrated to obtain solid ammonium hypophosphite. |
| Hazard Information | Back Directory | [Chemical Properties]
white crystals | [Uses]
As catalyst in polyamide manufacture. | [General Description]
White crystalline solid. Sinks and mixes with water. | [Hazard]
Evolves flammable and toxic fumes on heating. | [Reactivity Profile]
AMMONIUM HYPOPHOSPHITE liberates spontaneously flammable phosphine at about 240°C [Mellor 8:880 1946-47]. Some inorganic materials, such as hypophosphites, tend to form explosive mixtures with perchloric acid when hot [Analyst 84:215 1959]. | [Air & Water Reactions]
Water soluble. AMMONIUM HYPOPHOSPHITE(7803-65-8) liberates spontaneously flammable phosphine at about 240°C [Mellor 8:880 1946-47]. | [Health Hazard]
Non-toxic or low toxicity unless heated to decomposition (240°C). | [Purification Methods]
Crystallise it from hot EtOH. | [Flammability and Explosibility]
Notclassified |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [WGK Germany ]
3
| [TSCA ]
TSCA listed | [REACH Registrations]
Active | [HS Code ]
28351000 | [Storage Class]
11 - Combustible Solids | [Hazard Classifications]
Eye Irrit. 2
Skin Irrit. 2
STOT SE 3 | [Hazardous Substances Data]
7803-65-8(Hazardous Substances Data) |
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