D-Pyroglutamic acid |
|
Product Name: H-D-Pyr-OH
CAS#: 4042-36-8
Synonyms: D-Pyroglutamic acid
Molecular Formula: C5H7NO3
Molecular Weight: 129
Specification: (Corporation Standard )
Item
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Standard
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Analysis data
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Appearance
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White crystals
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Conforms
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Specific rotation[α]D/20
(C=2 in H2O)
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+10.8°to +12.3°
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+11.6°
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Melting Point (ºC)
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159 to 161 ºC
|
160.5ºC
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Chloride(C1)
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Not more than 0.02%
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<0.02%
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Sulfate(SO4)
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Not more than 0.02%
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<0.02%
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Iron(Fe)
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Not more than 30ppm
|
<30ppm
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Heavy metals(Pb)
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Not more than 10ppm
|
<10ppm
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Arsenic(As2O3)
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Not more than 1ppm
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<1ppm
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Loss on drying
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Not more than 0.50%
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0.18%
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Residue on ignition
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Not more than 0.10%
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0.09%
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Assay
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98.0%~101.0%
|
99.0%
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Conclusion
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The product conforms to the standard.
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