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Sodium Tripolyphosphate Light Density STPP

SoapGoods Inc
30 days
Price in points: 113 points
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Sodium Tripolyphosphate Light Density STPP, Safety Data Sheet


Normally used in commercial detergents. Highly charged chelating agent. STPP is widely used in regular and compact laundry detergents and automatic dishwashing detergents (in powder, liquid, gel and/or tablet form), toilet cleaners, surface cleaners, and coffee urn cleaners.

It also provides a number of chemical functions including: sequestration of "water hardness", enabling surfactants to function effectively; pH buffering; dirt emulsification and prevention of deposition; hydrolysis of grease; and dissolving-dispersing dirt particles.


Other Names: Pentasodium triphosphate, Sodium triphosphate, STPP
CAS: 7758-29-4
Appearance: Fine white granules
Solubility: Water Soluble
Natural or Synthetic: Synthetic
Recommended Retest or Shelf Life: 2 Years
Storage: Cool Dark Place
Purity: 94% by weight


Not for Ingestion.

It definitely works just like the old days when Cascade had the proper amount of phosphate in it. I add about 1/2 teaspoon to the main detergenet compartment along with a Finish tablet. I don't even use rinse aid anymore. It's that good. I know I sound like a commercial, but it's true. I suffered for years after phosphates were removed from dishwasher detergent.
Used this for a couple of weeks. Glasses are looking clearer. Wine glasses don't have the white film. Thanks
An excellent dishwasher soap booster: add 1/2 tsp to both pre and main wash soap dispensers in addition to regular soap. Leaves dishes squeaky clean.
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Safety Data Sheet (Sodium-Tripolyphosphate-Light-Density-STPP.pdf, 113 Kb) [Download]