Sodium triphosphate (food additive E451(I))

Sodium triphosphate (food additive E451(i))

Chemical Formula: Na₅P₃O₁₀

• Food additive E451(i)
• REACH: 01-2119430450-54-0006
• EC Number: 231-838-7
• CAS Number: 7758-29-4
• Standard: GOST 31638-2012 (Amendment 1)

Application:

Used in industry for stabilizing and fixing color, in the food industry for pH regulation, in paper, leather, and synthetic materials manufacturing, in the production of pharmaceuticals and cosmetics, as well as for corrosion protection, water treatment, and other purposes.

Characteristics and Indicators:

I. Organoleptic Indicators

No.	Parameter Name	Standard
1	Appearance	Free-flowing powder
2	Color	White
3	Odor	Odorless

II. Physical and Chemical Indicators

No.	Parameter Name	Standard
4	Sodium ion test	Passes the test
5	Phosphate ion test	Passes the test
6	Mass fraction of the main substance (E451(i) anhydrous), %, not less than	85.0
7	Mass fraction of total phosphorus pentoxide (P₂O₅), %	From 56.0 to 58.0 inclusive
8	Mass fraction of water-insoluble substances, %, not more than	0.1
9	pH of 1% aqueous solution of food-grade sodium tripolyphosphate	From 9.1 to 10.1 inclusive
10	Mass fraction of moisture loss during drying, %, not more than	0.7

III. Safety Indicators

No.	Parameter Name	Standard (mg/kg, not more than)
11	Fluoride (F)	50
12	Arsenic (As)	3.0
13	Lead (Pb)	4.0
14	Mercury (Hg)	1.0
15	Cadmium (Cd)	1.0