S-(Carboxymethyl)-L-Cysteine ​​CAS 638-23-3 (Carbocisteine) Assay 98.5 ~ 101.0%

S-(Carboxymethyl)-L-Cysteine, thaum qhuav, muaj tsis tsawg tshaj li 98.5 feem pua ​​thiab tsis ntau tshaj 101.0 feem pua ​​ntawm S-(Carboxymethyl)-L-Cysteine ​​(C5H9NO4S).
Nqe lus piav qhia: Dawb crystals lossis crystalline hmoov, me ntsis acid saj.
me ntsis soluble nyob rau hauv dej, xyaum insoluble nyob rau hauv ethanol thiab nyob rau hauv glacial acetic acid thiab nyob rau hauv ether.Dissolves nyob rau hauv dilute hydrochloric acid thiab nyob rau hauv sodium hydroxide TS.
Solubility (H2O, g / 100g): 0.13 (20 ℃)
Kev txheeb xyuas: Sib piv cov infrared absorption spectrum ntawm cov qauv nrog cov qauv ntawm cov txheej txheem potassium bromide disc.
Kev sib hloov tshwj xeeb [α]20 / D: Cov qauv qhuav, C = 10, pH6.0.Tom qab ziab cov qauv, noj li 5 g ntawm cov qauv.raug ntsuas, yaj hauv 20ml dej thiab sodium hydroxide tov (13 → 100).Tom qab pH hloov mus rau 6.0 nrog 1mol / L lossis 0.1mol / L hydrochloric acid TS, ces ntxiv dej kom raug 50ml.
Lub xeev ntawm kev daws teeb meem (Transmittance): 1.0g hauv 10ml ntawm 1mol / L NaOH, spectrophotometer, 430nm, 10mm cell thickness.
Chloride (Cl): 0.36g, A-2, ref: 0.40ml ntawm 0.01mol / L HCl
Ammonium (NH4): A-1
Sulfate (SO4): 1.2g, (2), ref: 0.50ml ntawm 0.005mol / L H2SO4
Hlau (Fe): 0.5g, (2), ref: 1.5ml ntawm Hlau Std.(0.01 mg/ml)
Heavy Metals (Pb): 2.0g, (2), ref: 2.0ml ntawm Pb Std.(0.01 mg/ml)
Arsenic (As2O3): 2.0g, (3), ref: 2.0ml ntawm As2O3 Std.
Lwm cov Amino Acids: 0.2mol/L NaOH, kuaj Sample: 75μg, B-2-a tswj;S-(Carboxymethyl)-L-Cysteine ​​0.15μg.Tom qab txhua qhov kev daws teeb meem pom ntawm lub phaj, lub phaj tsim ib zaug
Poob rau ziab: ntawm 105 ℃ rau 3 teev
Residue ntawm Ignition (Sulfated): AJI Test 13
Assay: Dried sample, 180mg, 0.1mol/L HCLO4 1ml = 17.920mg C5H9NO4S.Dissolve txog 180mg ntawm cov qauv, yav tas los qhuav thiab raug hnyav, hauv3ml ntawm formic acid, ntxiv raws nraim 15ml ntawm 0.1mol / L perchloric acid, thiab 50ml ntawm glacial acetic acid, thiab titrate tshaj perchloric acid nrog 0.1mol / L sodium acetate,txiav txim lub endpoint potentiometrically.Ua ib qho kev txiav txim siab dawb paug, thiab kho qhov tsim nyog.Txhua ml ntawm 0.1mol / L perchloric acid yog sib npaug rau 17.920mg ntawm C5H9NO4S.
pH: 1.0g hauv 10ml (Saturated aqueous tov)
Pom zoo cia txwv thiab mob: khaws cia ntim ntim ntawm qhov ntsuas kub (2 xyoos).