Ko te fosfate o te kālciu mā tāwhai, i mōhiotia hoki hei fosfate o te kālciu mā tāwhai, hei fosfate kālciu kua whakamātauria, e noho ana i ngā āhua anhydrous me ngā āhua dihydrate. Ko ngā rerekētanga matua i waenganui i te anhydrous me te dihydrate fosfate o te kālciu mā tāwhai i ō rātou pūrongo kimikirangi, te whaiwhai, ngā wāhi whakamātautau, me te pūmau. Ko ēnei rerekētanga te whakamārama i ngā āhua whakamātautau me ngā tauāki o rātou i ngā wāhi rerekē.
Ko te phosphate dicalcium he pūpākō kōmako, he whakamātautau kōmako, he kāore he wānanga, he kāore he reka. Ko tōna whārite matūtika ko CaHPO4·2H2O. He tatau tonu i te hau, engari i te whakamātautau i te 75℃, ka timata te ngaro o tana wai o te whakamātautau hei anhydrous, ā, i ngā tāwhai ake o te hōhi, ka huri mai ki te pyrophosphate. He māmā te whakamātautau i ngā āhua hāngā iti o te āhua hāngā hāngā, ngā āhua hāngā iti o te āhua hāngā nitric, me ngā āhua hāngā acetic, ā, he iti noa ngā whakamātautau i te wai. I te whakaaro i ngā uara ahua me ngā uara matūtika, me rereke te hōhi mō te whakamātautau i te wai i te 75℃; arā, mēnā kāore, ka ngaro te wai o te whakamātautau, ā, ka rereke te uara o te whakamātautau. (Ko te tātaritanga o te whenua e whakamārama ana i te whakamātautau i te acetone me te whakamātautau i te 50±2℃ i ngā hāora e rua.) I te whakaaro i te whārite molekūlar, ko te maha o ngā molekūlar he 172.10, ko te maha o ngā ātomi o te calcium he 40.078, ā, ko te maha o ngā ātomi o te phosphorus he 30.973762. Nō reira, ko te phosphate dicalcium māmā he 23.29% calcium me te 18.00% phosphorus.
Ko te dicalcium phosphate, i tāpia ai ko DCP, he whakamātautau kai hei whakauru i ngā mīnara o te calcium me te phosphorus ki ngā kai mō ngā kararehe me ngā manu kai. Ko tēnei i tēnei wā he whakamātautau matua o te "calcium + phosphorus" e whakamahinga ana i tō tātou whenua i ngā pānga o ngā kararehe me ngā manu kai, ā, kātahi anō ka whakaurua i te 1%-3%. Ko tana mahi matua he tohu i te phosphorus, te calcium, me ēnei ānō ngā mīnara hei whakamātautau mō ngā kai pūtea o ngā kararehe me ngā manu kai. Ko te DCP he māmā te whakamātautau, he māmā hoki te whakamātautau, ā, he whakamāngai i te tipanga me te whananga o ngā kararehe me ngā manu kai, he whakamāngai i te wā o te whakamāngai, me te whakamāngai i te whakamāngai tonu; ka whakamāngai i te tau o te whānanga me te tau o te ora o ngā kararehe me ngā manu kai; ka whakamāngai i te pānga o te mate, me te pānga o te makariri o ngā kararehe me ngā manu kai, ā, he whakamāngai, he whakamāngai hoki i ngā mate o te rickets, o te whero mā, me ngā whakamāngai o ngā kararehe me ngā manu kai.
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