三聚磷酸钠

三聚磷酸鈉

sānjù línsuānnà

noun

Meanings

1 sodium tripolyphosphate (STPP, Na5P3O10)
2 polyphosphate food additive and detergent builder

Characters

to gather; (chem) poly-

Examples

HSK 7-9

三聚磷酸钠常被用作虾仁等冷冻水产的保水剂。

Sānjù línsuānnà cháng bèi yòngzuò xiārén děng lěngdòng shuǐchǎn de bǎoshuǐjì.

Sodium tripolyphosphate is often used as a water-retention agent in frozen shrimp and other seafood.

HSK 7-9

洗衣粉里的三聚磷酸钠曾经是造成水体富营养化的主要原因之一。

Xǐyīfěn lǐ de sānjù línsuānnà céngjīng shì zàochéng shuǐtǐ fùyíngyǎnghuà de zhǔyào yuányīn zhīyī.

Sodium tripolyphosphate in laundry detergents was once a major cause of aquatic eutrophication.

Tips

grammar

Decompose right-to-left the way chemists do: 钠 = sodium, 酸 = acid, 磷 = phosphorus, 三聚 = 'tripolymer / three-unit condensate.' So 'three-condensed phosphoric-acid sodium' = sodium salt of tripolyphosphoric acid = sodium tripolyphosphate.

Stroke Order

三 sān

聚 jù

磷 lín

酸 suān

钠 nà