SHEET /m/disodium-phosphate · PubChem CID 24203 · CAS 7558-79-4 · REV 2026.07
Disodium phosphate
from sourceHNa2O4P · 141.959 g/mol
dibasic sodium phosphate · sodium phosphate dibasic · disodium orthophosphate · disodium acid phosphate
What is Disodium phosphate?
The salt that keeps evaporated milk from curdling and gives instant pudding its set. It is also a common water softener. from source
Fig. 1 · 2D structure RDKit
OP(=O)([O-])[O-].[Na+].[Na+]The dose makes the poison inferred
A reported rat oral LD50 for Disodium phosphate is 17,000 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
“The dose makes the poison” is a cross-species estimate shown as neutral science, not a threshold anyone should act on. Real toxicity depends on the person, not body mass alone.
Toxicity & hazards
Toxicity · LD50
17,000 mg/kg · very low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
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