偏钨酸铵
Ammonium paratungstate
CAS: 11120-25-5;14311-52-5
Molecular Formula: H4NO42W12(-9)
偏钨酸铵 - Names and Identifiers
| Name | Ammonium paratungstate |
| Synonyms | APT Wolfram W HC 40 Ammonium tungstate Ammonium wolframate TUNGSTEN AA STANDARD TUNGSTEN ICP STANDARD dioxido(dioxo)tungsten Ammonium paratungstate diammonium dioxido(dioxo)tungsten TUNGSTEN ATOMIC ABSORPTION STANDARD TUNGSTEN ATOMIC SPECTROSCOPY STANDARD tungstate(w12(oh)2o4019-),decaammonium |
| CAS | 11120-25-5 14311-52-5 |
| EINECS | 234-364-9 |
| InChI | InChI=1/2H3N.4O.W/h2*1H3;;;;;/q;;;;2*-1;/p+2/r2H3N.O4W/c;;1-5(2,3)4/h2*1H3;/q;;-2/p+2 |
| InChIKey | WFKWXMTUELFFGS-UHFFFAOYSA-N |
偏钨酸铵 - Physico-chemical Properties
| Molecular Formula | H4NO42W12(-9) |
| Molar Mass | 2896.08 |
| Density | 2.3 g/mL at 25 °C(lit.) |
| Melting Point | 3410°C(lit.) |
| Boling Point | 5660°C(lit.) |
| Water Solubility | Soluble in water. Insoluble in alcohol |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | White to white-like powder |
| Color | White |
| Exposure Limit | ACGIH: TWA 3 mg/m3NIOSH: TWA 1 mg/m3; STEL 3 mg/m3 |
| Merck | 13,567 |
| Storage Condition | Room Temprature |
| MDL | MFCD00042673 |
| Physical and Chemical Properties | Character: white crystal. soluble in water, insoluble in alcohol. density 2.3 melting point> 300°C |
| Use | Used as a raw material for the manufacture of other tungsten compounds and metallic tungsten |
偏钨酸铵 - Risk and Safety
| Risk Codes | R11 - Highly Flammable R36/38 - Irritating to eyes and skin. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S6 - Keep under ... (there follows the name of an inert gas). S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | UN 3089 4.1/PG 2 |
| WGK Germany | - |
| RTECS | YO7175000 |
| TSCA | Yes |
| HS Code | 28418010 |
| Hazard Class | 8 |
| Packing Group | III |
偏钨酸铵 - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Ammonium chloride Calcium chloride Magnesium chloride Sodium Chloride Sodium hydroxide Hydrochloric acid Ammonia |
偏钨酸铵 - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Overview | Ammonium paratungstate (APT) is an important tungsten intermediate product, mainly white crystals, with flake or needle. It can be used to make tungsten trioxide or blue tungsten oxide. The quality of tungsten products largely depends on the chemical purity, particle size and particle size distribution of APT. |
| application | ammonium paratungstate crystallization is the main intermediate product for preparing tungsten products blue tungsten oxide, ammonium tungsten bronze and tungsten powder. its morphology and structure greatly affect the morphology and properties of tungsten products. The particle size and bulk density of tungsten products are dependent on the raw material ammonium paratungstate. Ammonium tungsten bronze prepared by ammonium paratungstate containing different crystal water has very different properties. Di Yuying and other studies have shown that ammonium tungsten bronze made from ammonium pentahydrate and ammonium pentatungstate has good performance. |
| Use | Used as a raw material for manufacturing other tungsten compounds and metal tungsten |
Last Update：2024-04-09 15:16:47
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View History
偏钨酸铵
6-氯-5-羟基烟酸叔丁酯
(TRIMETHYLSILYL)ACETIC ACID
剑麻皂苷元(标准品)
SULTAN 4B
2-[(2-BROMOBENZOYL)AMINO]BENZOIC ACID
Direct black 80 (C.I. 31600)
6-氯-5-羟基烟酸叔丁酯
(TRIMETHYLSILYL)ACETIC ACID
剑麻皂苷元(标准品)
SULTAN 4B
2-[(2-BROMOBENZOYL)AMINO]BENZOIC ACID
Direct black 80 (C.I. 31600)
Raw Materials for 偏钨酸铵