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磷酸氫二銨（DAP）

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磷酸氫二銨（DAP）

別名：磷酸二銨

化學式：(NH₄)₂HPO₄
分子量：132.0
執行標準：Q/CABY-002-92
性狀：白色粒狀晶體或粉末，相對密度1.619,熔點155℃,易溶于水,不溶于醇,1%水溶液PH值為8.0,在空氣中逐漸失去氨生成磷酸二氫銨。
用途：主要用于木材、紙張、織物作防火劑,也用作防火涂料添加劑,還用于印刷制版和醫藥的制造等.在食品工業中用作發酵劑、營養劑等。農業上用作高效肥料。

包裝：內塑外編，每袋凈重25 Kg、50Kg。
技術指標： (見下表)

序號	指標名稱	工業級	食品級
1	主含量（以(NH₄)₂HPO₄ 計）%≥	98.0	98.0
2	五氧化二磷（以P₂O₅ 計）%≥	53.0	53.0
3	氮（以N計）%≥	20.8	20.8
4	PH值	7.8-8.2	7.8-8.2
5	水份%≤	1.0	0.5
6	重金屬（以Pb計）%≤	--	0.001
7	砷（以As計）%≤	--	0.0003
8	氟化物（以F計）%≤	--	0.005
9	水不溶物%≤	0.20	0.10

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