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DL-Methionine (CAS # 59-51-8)

Chemical Property:

Molecular Formula C5H11NO2S
Molar Mass 149.21 Nws
Qhov ntom 1.34 ib
Melting Point 284 ° C (hnub) (lit.)
Boling Point 306.9 ± 37.0 ° C (Tshaj tawm)
Kev sib hloov tshwj xeeb (α) -1 ~ + 1 ° (D / 20 ℃) ​​(c = 8, HCl)
JECFA Number 1424 ib
Dej Solubility 2.9 g / 100 mL (20 ºC) yog '
Solubility Soluble hauv dej, dilute acid thiab dilute alkali, me ntsis soluble hauv 95% cawv, insoluble hauv ether
Qhov tshwm sim Crystalline hmoov
Xim Dawb
Merck 14, 5975 ib
BRN 6 36185
pKa 2.13 (ntawm 25 ℃)
Kev cia khoom 2-8 ° C
Kev ruaj ntseg ruaj khov. Incompatible nrog muaj zog oxidizing tus neeg sawv cev.
rhiab heev Sensitive rau lub teeb
Refractive Index 1.5216 (kwv yees)
MDL TIAB SA 00063096
Physical thiab Chemical Properties Dawb flaky crystal lossis crystalline hmoov. Tshwj xeeb tsw. Cov saj yog me ntsis qab zib. Melting point 281 degrees (decomposition). 10% pH ntawm aqueous tov 5.6-6.1. Tsis muaj kev sib hloov kho qhov muag. Stable rau cua sov thiab cua. Tsis ruaj khov rau cov acids muaj zog, tuaj yeem ua rau demethylation. Soluble hauv dej (3.3g / 100ml, 25 degrees), dilute acid thiab dilute tov. Heev insoluble nyob rau hauv ethanol, yuav luag insoluble nyob rau hauv ether
Siv Siv ua Biochemical reagent

Product Detail

Khoom cim npe

Hazard Cov Cim Xi-xaj
Risk Codes R33 - Kev phom sij ntawm cov teebmeem tshwm sim
R36/37/38 - Kab mob rau qhov muag, ua pa thiab tawv nqaij.
Kev nyab xeeb piav qhia S24/25 - Tsis txhob sib cuag nrog daim tawv nqaij thiab qhov muag.
S36 - Hnav khaub ncaws tiv thaiv zoo.
S26 - Thaum sib cuag nrog lub qhov muag, yaug tam sim ntawd nrog dej txaus thiab nrhiav kev kho mob.
WGK Germany 2
RTECS PIB 0457000
FLUKA BRAND F CODE 10-23
TSCA Yog lawm
HS Code 29304090 ib

 

Taw qhia

DL-Methionine yog ib qho tsis muaj polar amino acid. Nws cov khoom yog dawb crystalline hmoov, tsw ntxhiab, me ntsis iab, soluble hauv dej.

 

DL-Methionine tuaj yeem npaj tau los ntawm ntau txoj hauv kev. Txoj kev siv feem ntau yog los ntawm kev siv tshuaj lom neeg. Tshwj xeeb, DL-methionine tuaj yeem tsim los ntawm acylation cov tshuaj tiv thaiv ntawm alanine tom qab los ntawm kev txo qis.

 

Cov Lus Qhia Txog Kev Nyab Xeeb: DL-Methionine muaj kev nyab xeeb nrog kev siv ib txwm muaj thiab noj tsawg. Kev noj ntau dhau tuaj yeem ua rau qee yam kev mob tshwm sim xws li xeev siab, ntuav, thiab raws plab. Nws yuav tsum tau siv nrog ceev faj rau qee pawg neeg, xws li cov poj niam cev xeeb tub, menyuam mos thiab menyuam yaus, thiab cov neeg muaj kev fab tshuaj.


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