Tetrasodium Iminodisuccinate
What is Tetrasodium Iminodisuccinate?
Tetrasodium Iminodisuccinate is the tetrasodium salt of iminodisuccinic acid, a synthetic aminopolycarboxylic chelator structurally related to aspartic and succinic acids. Produced through chemical synthesis, it serves as a multifunctional ingredient in rinse-off and leave-on cosmetics like cleansers, toners, shampoos, and lotions. In formulations, it works by coordinating with divalent and trivalent metal cations such as calcium, magnesium, iron, and copper, forming soluble complexes. This action inhibits metal-catalyzed degradation, reduces water hardness effects, prevents soap scum formation, maintains preservative efficacy, and avoids discoloration or phase separation. Effective at concentrations around 0.1-2%, it is valued for its high water solubility and stability across pH ranges, offering a biodegradable alternative to phosphonate or EDTA-based chelators in modern cosmetic chemistry.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Stabilizes formulations by sequestering metal ions to prevent degradation
Maintains product clarity and consistency over time
Supports effective preservation without harsh additives
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals seeking stable, long-lasting skincare products | Those with rare allergies to polycarboxylate chelators |
| People with sensitive skin preferring low-hazard ingredients | People avoiding synthetic ingredients entirely |
| Users interested in eco-friendly, biodegradable components | Individuals preferring mineral-free formulations |
Safety Notes
- Recognized as low hazard by environmental health assessments
- Approved for cosmetic use in regulatory databases with no significant concerns
Frequently Asked Questions about Tetrasodium Iminodisuccinate
What role does Tetrasodium Iminodisuccinate play in skincare?
It acts as a chelating agent, binding metal ions to enhance formula stability and clarity.
Is it safe for daily use?
It carries a low hazard rating and is suitable for most skincare routines.
Does it cause irritation?
Evidence indicates low irritating potential for skin.