4-Hydroxybenzoic acid CAS 99-96-7
4-Hydroxybenzoic acid, tseem hu ua nipagin ester, feem ntau yog siv rau hauv cov kua ntses, kua txiv hmab txiv ntoo jam, dej haus txias, thiab lwm yam. Nws yog cov hmoov crystalline tsis muaj xim lossis dawb crystalline, tsis muaj ntxhiab thiab tsis qab. Cov nyhuv tiv thaiv xeb zoo dua li benzoic acid thiab nws cov ntsev sodium, nrog rau kev siv li ntawm 1/10 ntawm sodium benzoate thiab ntau yam kev siv ntawm pH 4-8.
| Khoom | Cov Lus Qhia Tshwj Xeeb |
| Kub taw tes | 213.5°C (kwv yees li qub) |
| Qhov Ceev | 1,46 g/cm3 |
| Qhov kub yaj | 213-217 °C (lit.) |
| Lub zog ua pa | 0Pa ntawm 20 ℃ |
| kev tiv taus | 1.4600 (kwv yees) |
| Cov xwm txheej cia khoom | Khaws cia rau hauv qab +30 ° C. |
4-Hydroxybenzoic acid feem ntau yog siv ua cov khoom siv raw rau cov khoom siv tshuaj zoo, thaum parabens, tseem hu ua p-hydroxybenzoic acid esters, tau siv dav ua cov tshuaj preservatives hauv zaub mov, tshuaj, thiab tshuaj pleev ib ce. Lawv kuj siv dav hauv kev npaj ntau yam xim, fungicides, xim zaj duab xis, thiab ntau yam roj soluble xim couplers. Cov polymer tshiab kub-resistant p-hydroxybenzoic acid polyester, uas muaj ntau yam kev siv, kuj siv ua cov khoom siv raw.
Feem ntau ntim rau hauv 25kg / nruas, thiab kuj tuaj yeem ua pob khoom raws li koj xav tau.
4-Hydroxybenzoic acid CAS 99-96-7
4-Hydroxybenzoic acid CAS 99-96-7
