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

552.0

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