CAS号:149-87-1
品名:DL-焦谷氨酸5-oxoproline
中文别名:吡咯烷酮羧酸;DL-谷氨酸-Y-内酰胺;DL-2-吡咯烷酮-5-羧酸;5-氧代吡咯烷-2-羧酸;2-吡咯烷酮-5-甲酸;(±)-2-吡咯烷酮-5-羧酸;DL-焦性胶氨酸;2-吡咯烷酮-5-羧酸;
英文别名:DL-Pyroglutamicacid;5-Oxopyrrolidine-2-carboxylicAcid;D,l-2-Pyrrolidone-5-CarboxylicAcid;2-Pyrrolidone-5-carboxylicacid;DL-2-Pyrrolidone-5-carboxylicacid;H-DL-Pyr-OH;DL-GlutamicAcidLactam;DL-PyroglutamicAcid;
分子式:C5H7NO3
分子量:129.114
精确质量:129.043
Psa:66.4
BRN号:82131
EINECS号:205-748-3
MDL号:MFCD00064322
PubChem号:24857617
外观与性状:白色粉末
密度:1.38 g/cm3
沸点:453.1ºC at 760 mmHg
熔点:180-185ºC
闪点:227.8ºC
折射率:1.511
稳定性:Stable under normal temperatures and pressures.
储存条件:Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
蒸汽压:1.79E-09mmHg at 25°C
安全说明:S26-S37/39
危险类别码:R36/37/38
海关编码:29337900
危险品标志:Xi
信号词:Warning
危险性防范说明:P261; P305 + P351 + P338
危险标志:GHS07
危险性描述:H302; H315; H319; H335
简介:Pyroglutamicacid(alsoknownasPCA,5-oxoproline,pidolicacid,orpyroglutamateforitsbasicform)isanuncommonandlittlestudiedaminoacidderivativeinwhichthefreeaminogroupofglutamicacidorglutaminecyclizestoformalactam.Itisametaboliteintheglutathionecyclethatisconvertedtoglutamateby5-oxoprolinase.Pyroglutamateisfoundinmanyproteinsincludingbacteriorhodopsin.N-terminalglutamicacidandglutamineresiduescanspontaneouslycyclizetobecomepyroglutamate.ThisisoneofseveralformsofblockedN-terminalswhichpresentaproblemforN-terminalsequencingusingEdmanchemistry,whichrequiresafreeprimaryaminogroupnotpresentinpyroglutamicacid.TheenzymepyroglutamateaminopeptidasecanrestoreafreeN-terminusbycleavingoffthepyroglutamateresidue.
用途:医药中间体;化妆品原料;用作生化试剂。