Sodium Stannate

What is Sodium Stannate?

Sodium stannate is an inorganic compound, the sodium salt of stannic acid with the formula Na2SnO3, often hydrated. It forms a white, water-soluble powder produced by reacting tin oxide with sodium hydroxide. Primarily used in rinse-off cosmetics like shampoos, conditioners, body washes, and antiperspirants, it serves as a formulation aid. It works by buffering solutions to inhibit corrosion on metal surfaces or packaging, enhancing physical stability to prevent phase separation or precipitation in emulsions, and modifying rheological properties to achieve desired thickness. This ensures products remain uniform, easy to dispense, and effective against degradation from light, heat, or ingredient interactions during storage and use, supporting overall formulation integrity without altering sensory attributes.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Stabilising
Improves physical and/or chemical stability (e.g., preventing separation, precipitation, or degradation) to keep performance consistent over shelf life.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Maintains smooth, even texture in liquid and emulsion-based products.

Prevents formula breakdown for reliable application over time.

Improves product stability across shelf life in various care items.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of shampoos or cleansers needing consistent pourability.
Those with rare tin sensitivities or allergies.
Individuals seeking durable product performance in daily routines.
Individuals preferring metal-free cosmetic ingredients.
People with normal to oily skin, given its non-comedogenic profile.
People with ultra-sensitive skin opting for minimal additives.

Safety Notes

  • Assessed as low hazard in cosmetic safety reviews.
  • Typically non-sensitizing in approved uses.

Frequently Asked Questions about Sodium Stannate

What does sodium stannate do in products?

It stabilizes mixtures and adjusts thickness for better consistency and usability.

Is sodium stannate safe for skin?

Safety data indicates low hazard when used as directed in cosmetics.

Does it clog pores?

It has a comedogenic rating of zero, suitable for pore-friendly formulas.