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Tetrasodium Iminodisuccinate

  • Chelators
  • CAS 144538-83-0
  • IUPAC: Tetrasodium 2,2'-(azanediyl)disuccinate

Tetrasodium Iminodisuccinate (CAS 144538-83-0) appears in 4 of the 1,812 car-care products CarCareTruth tracks (as of June 2026). It is on the EPA Safer Choice list.

No significant health hazards at concentrations used in consumer products. No GHS hazard classification at typical use concentrations.

Tetrasodium iminodisuccinate (IDS) is an aminopolycarboxylate chelating agent used to bind calcium, magnesium, and iron ions that would otherwise reduce surfactant effectiveness in hard water. It is featured on the EPA Safer Choice ingredient list as a preferred alternative to EDTA and NTA — both of which carry environmental persistence concerns IDS does not share. IDS is readily biodegradable and has low aquatic toxicity, making it a meaningful positive for the environmental profile of formulas that include it.

Health & environment profile

VOC
no
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
yes
Aquatic toxicity
no
Biodegradable
yes
Bioaccumulative
no
Persistent
no
Ozone depleting
no
Microplastic
no
PFAS
no
Env. score
5/5
Purpose: Chelating agent and hard water mineral binder in cleaning formulas; EPA Safer Choice listed alternative to EDTA

Common questions about Tetrasodium Iminodisuccinate

What is Tetrasodium Iminodisuccinate used for in car care?
Chelating agent and hard water mineral binder in cleaning formulas; EPA Safer Choice listed alternative to EDTA
Is Tetrasodium Iminodisuccinate a VOC?
No. Tetrasodium Iminodisuccinate is not classified as a volatile organic compound (VOC).
Is Tetrasodium Iminodisuccinate on California's Proposition 65 list?
No. Tetrasodium Iminodisuccinate is not on California's Proposition 65 list.
Is Tetrasodium Iminodisuccinate EPA Safer Choice certified?
Yes. Tetrasodium Iminodisuccinate is on the EPA Safer Choice list.

4 products contain this

Related

Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.