Fumaric acid tuaj yeem siv ua acidity regulator

Fumaric acid, tseem hu ua fumaric acid, violet acid los yog lichenic acid, uas yog fumaric acid (IUPAC lub npe (E)-butenedioic acid), yog ib tug tsis muaj kob, flammable siv lead ua muaj li ntawm Carboxylic acids muab los ntawm butene. Kev kub hnyiab fumaric acid tso tawm cov pa phem ntawm cov txiv neej anhydride fumes. Nws saj zoo li txiv hmab txiv ntoo thiab muaj nyob rau hauv Corydalis, Boletus, Lichens, thiab Icelandic Nori.

Tiv tauj peb

cov khoom paub meej

Kev piav qhia

Fumaric acid yog siv nyob rau hauv zus tau tej cov unsaturated polyester resins. Hom resin no yog cov yam ntxwv ntawm cov tshuaj lom neeg zoo thiab ua haujlwm kub; cov copolymer ntawm fumaric acid thiab vinyl acetate yog cov nplaum zoo. Copolymer nrog styrene yog cov khoom siv raw rau kev tsim FRP. Lub plasticizer ua los ntawm fumaric acid yog non-toxic thiab siv tau rau vinyl acetate latex nyob rau hauv kev sib cuag nrog zaub mov. Cov khoom no yog ib tug zoo tshuaj nruab nrab xws li tshuaj thiab kho qhov muag bleaching neeg sawv cev. Nws yog siv nyob rau hauv zus tau tej cov tshuaj antidote dimercaptosuccinic acid nyob rau hauv kev lag luam kws tshuaj. Cov fumaric acid yog neutralized nrog sodium carbonate kom tau sodium fumarate ( [17013-01-3]), thiab tom qab ntawd hloov nrog ferrous sulfate kom tau hlau fumarate, uas yog siv los kho cov ntshav liab me me anemia nrog cov tshuaj nplua nuj hlau. Cov khoom no yog siv los ua khoom noj khoom haus additive-qaub tus neeg saib xyuas, siv rau hauv cov dej qab zib, txiv hmab txiv ntoo khoom qab zib, jelly, ice cream, thiab lwm yam., feem ntau yog siv nyob rau hauv ua ke nrog nrog qaub acid citric acid. Cov ntsev monosodium ua los ntawm cov tshuaj tiv thaiv ntawm fumaric acid thiab sodium hydroxide, Nws kuj yog siv los ua qaub seasoning thiab ua ib qho nruab nrab rau hluavtaws cob thiab mordant.

piav 2

Daim ntawv thov

Hauv cov khoom noj tsuas yog siv rau hauv cov khoom noj nqaij, cov khoom siv ntses ua thiab lwm yam. Fumaric acid tuaj yeem siv ua acidity regulator, acidifier, antioxidant, salting promoter thiab txuj lom. Cov khoom no muaj cov nyhuv tsis zoo los ua kom cov tshuaj aqueous ntawm pH3.0, thiab muaj lub luag haujlwm tseem ceeb hauv kev tiv thaiv kab mob thiab kab mob mildew, tib lub sijhawm, nws muaj astringent saj, yog ib qho ntawm cov kua qaub acidic acids, tsis tshua muaj kev nqus, thiab pab kom ntev lub neej ntawm cov khoom siv hmoov. Thaum fumaric acid hloov mus rau hauv sodium fumarate, dej solubility thiab tsw zoo dua.

Khoom specification

Khoom npe	Fumaric acid
CAS	110-17-8 ib
MF	C4H4O4
MW	116.07 Nws
EINECS	203-743-0 ib
Fumaric acid Chemical Properties	?
Melting point	298-300 ° C (sub.) (lit.)
Boiling point	137.07°C (kev kwv yees)
ceev	1.62 ib
vapor siab	1.7 hli Hg (165 ° C)
FEMA	2488 \| FUMARIC ACID
Refractive Index	1.5260 (kwv yees)
Fp	230 ° C
cia temp.	Khaws hauv qab +30 ° C.
solubility	95% ethanol: soluble 0.46g / 10 mL, ntshiab, tsis muaj xim
daim ntawv	Fine Crystalline hmoov
pka ua	3.02, 4.38 (ntawm 25oC)
xim	Dawb
PH	2.1 (4.9g / l, H2O, 20oC)
tawg txwv	40%
Dej Solubility	0.63 g / 100 mL (25 oC) yog '
JECFA Number	618
Merck	144,287 ib
BRN	6 05763
Kev ruaj ntseg:	Nyob ruaj khov ntawm chav tsev kub. Decomposes nyob ib ncig ntawm 230 C. Incompatible nrog muaj zog oxidizing cov neeg ua hauj, hauv paus, txo cov neeg ua hauj. Hluav taws kub.
InChIKey	VZCYOOQTPOCHFL-OWOJBTEDSA-N
CAS DataBase Reference	110-17-8 (CAS DataBase Reference)
NIST Chemistry Reference	Fumaric acid (110-17-8)
EPA Tshuaj Registry System	Fumaric acid (110-17-8)

Cov khoom	Cov qauv
Kev ntsuas (%)	≥99.0
Mesh	Los ntawm 300 Mesh
AS PPM	≤ 3
Heavy Metals (Pb)	≤10
Dej (%)	≤0.3
Maleic Acid (%)	≤0.1
Xim (Pt-Co)	≤15 hli
Melting Point (oC)	286-289 : kuv
Solubility (25oC)	≥1.00g / 100ml Dej