L-Phenylalanine CAS 63-91-2 (H-Phe-OH) Chiyero 98.5 ~ 101.5% Factory High Quality

L-Phenylalanine, kana yakaomeswa, ine kwete pasi pe98.5% yeC9H11NO2.
Tsanangudzo L-Phenylalanine inoitika semakristasi machena kana crystalline poda.Haina hwema kana kuti ine kakunhuhwirira kanonhuwa, uye ine kakuvira kanovava.Inonyungudika zvakasununguka muformic acid, inonyungudika zvishoma mumvura, uye isinganyungudika mu ethanol (95).Inonyungudika mu dilute hydrochloride acid.
Chiziviso Sarudza iyo infrared absorption spectrum yeL-Phenylalanine, yakamboomeswa, sekurairwa mu potassium bromide disk nzira pasi peInfrared Spectrophotometry <2.25>, uye enzanisa iyo spectrum neReferensi Spectrum: ese ari maviri anoratidza kusimba kwakafanana kwekunyura panhamba imwechete yemafungu. .
Optical Rotation <2.49> [a]D20: -33.0° kusvika -35.59° (mushure mekuoma, 0.5 g, mvura, 25 mL, 100 mm).
pH <2.54> Dissolve 0.20 g yeL-Phenylalanine mu20 mL yemvura: pH yemushonga uyu iri pakati pe5.3 ne6.3
Kuchena (1) Kujeka uye ruvara rwekugadzirisa-Dissolve 0.5 g yeL-Phenylalanine mu 10 mL ye 1 mol hydrochloric acid TS: mhinduro yakajeka uye isina ruvara.
(2) Chloride <1.03>-Ita muedzo ne 0.5 g yeL-Phenylalanine.Gadzirira mhinduro yekudzora ne 0.30 mL ye0.01 mol/L hydrochloride acid VS (kwete kupfuura 0.021%).
(3) Sulfate <1.14>-Ita muedzo ne 0.6 g yeL-Phenylalanine.Gadzirira mhinduro yekudzora ne 0.35 mL ye0.005 mol/L sulfuric acid VS (kwete kupfuura 0.028z).
(4) Ammonium <1.02>-Ita muedzo ne 0.25 g yeL-Phenylalanine.Gadzirira mhinduro yekutonga ne 5.0 mL yeStandard Ammonium Solution (kwete kupfuura 0.02%).
(5) Heavy Metals <1.07>-Dissolve 1.0 g yeL-Phenylalanine mu40 mL yemvura uye 2 mL ye dilute acetic acid nekudziya, kutonhorera, uye kuwedzera mvura kuita 50 mL.Ita bvunzo uchishandisa iyi mhinduro seyeyedzo mhinduro.Gadzirira mhinduro yekutonga sezvinotevera: ku 2.0 mL yeStandard Lead Solution wedzera 2 mL ye dilute acetic acid nemvura kuti uite 50 mL (kwete kupfuura 20 ppm).
(6) Arsenic <1.11> -Dissolve 1.0 g yeL-Phenylalanine mu 5 mL ye dilute hydrochloride acid uye 15 mL yemvura, uye ita muedzo nemhinduro iyi semhinduro yekuedza (kwete kupfuura 2 ppm).
(7) Zvinhu Zvine hukama-Dissolve 0.10 g yeL-Phenylalanine mu 25 mL yemvura, uye shandisa mhinduro iyi semuenzaniso wekugadzirisa.Pombi 1 mL yemushonga wemuyedzo, wobva wawedzera mvura kuita 50mL chaiyo.Pombi 5 mL yemushonga uyu, wedzera mvura kuita 20 mL chaiyo, uye shandisa mhinduro iyi seyakajairwa mhinduro.Ita bvunzo nemhinduro idzi sekurairwa pasi peThin-layer Chromatography <2.03>.Spot 5mL imwe neimwe yemhinduro yemuenzaniso uye yakajairwa mhinduro pandiro yesilica gel kune yakatetepa-layer chromatography.Gadzira ndiro nemusanganiswa we1-butanol, mvura neacetic acid (100) (3:1:1) kusvika kureba ingangoita masendimita gumi, woomesa ndiro yacho pa809Cfor30minutes.Pfaya zvakaenzana mhinduro yeninhydrin muacetone (1 in50) pandiro, uye kupisa pa80 ℃ kwemaminitsi mashanu: makwapa kunze kwenzvimbo huru kubva mumhinduro yemuenzaniso haana kusimba kupfuura nzvimbo kubva kune yakajairwa mhinduro.
Kurasikirwa paKuomesa <2.41> Kwete kupfuura 0.30% (1 g, 105℃, maawa matatu).
Residue paIgnition <2.44> Kwete kupfuura 0.10% (1 g).
Assay Weresa nemazvo 0.17 g yeL-Phenylalanine, yakamboomeswa, uye yakanyungudika mu3 mL yeformic acid, wedzera 50mL yeacetic acid (100), uye titrate <2.50> ine 0.1 mol/L perchloric acid VS (potentiometric titration).Ita chisungo chisina chinhu, uye ita chero gadziriso inodiwa.
Imwe mL ye0.1 mol/L perchloric acid VS＝16.52 mg yeC9H11NO2
Midziyo uye kuchengetedza Containers-Tight midziyo.