序号

No.

指标名称

Specifications

工业级

Tech grade

食品级

Food grade

1

    主含量(KH2PO4计)            % ≥

     Main content

99.0

99.0

2

    氧化钾(K2O)                  % ≥

     K2O

34.0

34.0

3

    五氧化二磷（P2O5）           % ≥

    Phosphorus pentoxide

52.0

52.0

4

     1%水溶液PH值     

    PH of 1% solution

4.3-4.7

4.2-4.7

5

    水份(H2O)                   % ≤

     Moisture

0.5

0.2

6

    水不溶物                    % ≤

    Water insoluble

0.1

0.2

7

    氯化物(以CI计)             % ≤

    Chloride, as CI

0.05

0.05

8

    砷(以As计)                 % ≤

    Arsenic, as AS

0.005

0.0003

9

    重金属 (以Pb计)           % ≤

     Heavy metal, as Pb

0.005

0.001

10

    铁     (以Fe计)            % ≤

     Lron Fe

0.003

0.003

11

    氟化物（以F计）             % ≤

    Fluoride, as F

-

0.001

12

    铅（以Pb)

    Lead (As P）                % ≤

-

0.0002