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Sodium Trimetaphosphate STMP
Applications include food processing, starch modification, pharmaceuticals, and potable water treatment.
Sodium Trimetaphosphate (STMP) is a Sodium Phosphate salt (NaPO3)3, supplier and exporter. Sodium Trimetaphosphate, Anhydrous (STMP) Powder is a clean, white powder. Sodium Trimetaphosphate. Applications include food processing, starch modification, pharmaceuticals, and potable water treatment.
Sodium Trimetaphosphate (STMP) is a Sodium Phosphate salt (NaPO3)3, that when added to gypsum can help to optimize the setting time while enhancing the structural integrity of the wallboard. STMP is an important additive in the production of high throughput and high quality wallboard for use by businesses and individuals in the construction and home remodeling industry.
sodium trimetaphosphate (“STMP”) can be utilized in the wallboard manufacturing process to increase the quality of wallboard. But note STMP is ineffective in high pH level environments (i.e., greater than 10). In all other environments, STMP can be used to increase the core quality of wallboard and allow manufacturers to reduce the amount of natural polymer (i.e., starch) used to produce wallboard of suitable quality.
STMP is a combination of earth metals and is known by the chemical equation (NaPO3)3. In its solid form it is a salt, but when dissolved in an aqueous solution, it is present as a trimetaphosphate ion.
Substances
Formula : Na3O9P3
Molecular weight : 305,89 g/mol
CAS-No. : 7785-84-4
EC-No. : 232-088-3
It is believed that the addition of STMP to the slurry promotes long crystal growth. Such crystals add the most strength to the core of the wallboard and also serve to form stronger bonds between the core and paper. While in theory, STMP can be used by manufacturers to decrease costs by increasing the core quality of wallboard, it has been discovered in practice that the current methods of adding STMP leads to further problems and delays.
| Form | Powder |
| Colour | White |
| Odour | Odourless |
| Odor Threshold | Not Applicable |
| pH | 6-8 at 100 g/l 20 °C |
| Melting Point | 1670°C (3038°F) (decomposition) |
| Boiling Point | Not Applicable |
| Solubility | Partially soluble |
| Ignition temperature | No information available. |
Sodium Trimetaphosphate occurs as white crystals or as a white, crystalline powder. It is a cyclic polyphosphate composed of three metaphosphate units. It is freely soluble in water. The pH of a 1:100 aqueous solution is about 6.0.