Is Sodium Polyacrylate Safe?

Sodium polyacrylate is a functional polymer used in a variety of common products such as paper diapers, pets pad, water retaining material (to help the soil retain water), instant snow and so on.

It is known for its superior absorbency:

Sodium polyacrylate can absorb hundreds of times its own weight in water. It starts out as a powder and as it comes into contact with moisture, it swells into its gel form.

Unlike other absorbent materials, it’s not easy to squeeze the moisture out of this gel. This is what makes it perfect for use in paper diapers — your baby can sit on it, roll around, sleep for hours in a wet diaper without leaks.

Is Sodium polyacrylate safe?

According to various material safety data sheets (documents created by the U.S. Occupational Safety and Health Administration that list potential hazards of chemicals in great detail), sodium polyacrylate is safe.

We can also know more through the MSDS (Material Safety Data Sheet) documents :

“How about touching the skin directly ?”

Sodium polyacrylate itself is not irritating to the skin. As a polymer, it sticks together in long chains that are way too large to be absorbed through the skin.

But some kind of sodium polyacrylate is mixed up with small amounts of acrylic acid, a leftover from the manufacturing process.

In theory, acrylic acid in large doses could be harmful to a baby’s skin. But according to a 2009 report in the Journal of Toxicology and Environmental Health, there isn’t nearly enough acrylic acid in disposable diapers to raise concern. (The study was funded by Procter & Gamble, a major manufacturer of diapers.)

Another side, sodium polyacrylate supplier should test the acrylic acid value and make sure it is less than 300 PPM (part per million).