CAS: 7758-16-9|Sodium Pyrophosphate

Xwm:
Dawb crystalline hmoov. Qhov txheeb ze qhov ntom ntom yog 1.86 thiab qhov ntsuas qhov cuam tshuam yog 1.510. Yooj yim soluble hauv dej (10g / 100mL, 20 degree) thiab ethanol. Nws yog hygroscopic, thiab aqueous kua yog acidic. Tus nqi pH ntawm 1% dej yog 4 txog 4.5. Nws decomposes rau hauv sodium metaphosphate ntawm 220 degree. Thaum cov tshuaj aqueous yog rhuab nrog dilute inorganic acid, nws yog hydrolyzed rau hauv phosphoric acid. Sodium acid pyrophosphate yog me ntsis hygroscopic thiab tsim rau crystalline hydrates tom qab nqus dej. Thaum rhuab mus rau saum 220 degree, nws decomposes tsim sodium metaphosphate.

Txoj kev npaj:
Ntxiv cov zaub mov-qib soda tshauv rau lub nruab nrab, cua sov thiab yaj nrog nplawm, tom qab ntawd ntxiv cov zaub mov-qib phosphoric acid rau cov tshuaj tiv thaiv nruab nrab, tswj cov tshuaj tiv thaiv qhov kawg pH rau -4 ~ 4.4, thiab tsim sodium dihydrogen phosphate. Lim cov tshuaj ntawm 70 ~ 80 degree. Cov lim dej yog evaporated thiab concentrated, txias rau crystallization, centrifuged, thiab qhuav thiab dehydrated ntawm 95 degree los ua anhydrous sodium dihydrogen phosphate. Tom qab ntawd nws yog rhuab ntawm 140 mus rau 200 degree rau polymerization thiab hloov mus rau hauv disodium dihydrogen pyrophosphate.

Siv:
Siv ua tus neeg sawv cev buffering, leavening agent, nplaum, stabilizer, chelating tus neeg saib xyuas thiab emulsifier. Peb lub teb chaws tau hais tias nws tuaj yeem siv rau hauv khob cij thiab biscuits, nrog kev siv ntau tshaj 3. og / kg; Cov khoom noj nqaij: lg / kg; txiv hmab txiv ntoo thiab zaub peeling GMP. Nws feem ntau tsis siv ib leeg, tab sis feem ntau yog siv ua ke nrog alkaline ntsev sodium pyrophosphate.

Daim ntawv thov:
Siv ua tus neeg sawv cev buffering, leavening agent, nplaum, stabilizer, chelating tus neeg saib xyuas thiab emulsifier.

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