Calcium phosphate tribasic
CAS 7758-87-4
EC 231-840-8
Formula Ca.2/3H3O4P
MW 310.18 g/mol
Salts & Minerals Food & NutritionBuilding & ConstructionAgriculture & FeedPharmaceuticals & Healthcare pH Regulation & BufferingChelation & SequestrationFlame RetardancyPreservation & Biocide
Description
Calcium Phosphate Tribasic (CAS 7758-87-4) is an inorganic calcium salt approved as food additive E341(iii) under EU regulation. Also referred to as tricalcium phosphate or TCP, it is classified under HS code 2835 26 00 and falls within the broader calcium phosphate family alongside mono- and dibasic forms.
In food and pharmaceutical manufacturing, TCP acts as an anti-caking agent by binding free moisture at particle surfaces, keeping powdered mixes free-flowing. In agriculture, it serves as a slow-release phosphorus source, with soil microbes gradually solubilising the mineral to improve bioavailability. Building material formulators incorporate it as a flame retardant, where thermal decomposition releases phosphate species that interrupt combustion chemistry.
TCP is available in food-grade (E341iii), FCC, and Ph.Eur.-compliant grades, supporting procurement across regulated industries. The substance is registered under REACH and supplied as a white powder in 25 kg bags or bulk quantities depending on application requirements.
In food and pharmaceutical manufacturing, TCP acts as an anti-caking agent by binding free moisture at particle surfaces, keeping powdered mixes free-flowing. In agriculture, it serves as a slow-release phosphorus source, with soil microbes gradually solubilising the mineral to improve bioavailability. Building material formulators incorporate it as a flame retardant, where thermal decomposition releases phosphate species that interrupt combustion chemistry.
TCP is available in food-grade (E341iii), FCC, and Ph.Eur.-compliant grades, supporting procurement across regulated industries. The substance is registered under REACH and supplied as a white powder in 25 kg bags or bulk quantities depending on application requirements.
Physical Properties
| Melting Point | 1670 °C |
| Density | 3.14 g/cm³ |
| Appearance | white powder |
| Color | White |
| Odor | Odorless |
| Form | aqueous suspension |
| Water Solubility | 0.1 g/L (25 ºC) |
| Refractive Index | 1.63 |
| pH | 6-8 (50g/l, H2O, 20°C) suspension |
| Log P | -2.15 |
Safety & Handling (Learn More)
Danger GHS05
H
H318
P
P280P317P264+P265P305+P354+P338
Trade & Regulatory
| HS Code | 2835 26 00 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
Tricalcium DiphosphateTCPBCPE341iiitricalcium phosphatebonarkaE341(iii)calcigenolsimpleCalcium phosphate
Related Products
Raw Materials
Derivatives
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