Alginic acid from brown algae
Molecular Structure:
MDL:
MFCD00081309
Molecular Formula:
(C6H8O6)n
Molecular Weight:
176.12
Alias:
藻朊酸,藻酸,褐藻酸,藻蛋白酸
Alginic Acid
Alginic acid from Macrocystis pyrifera (kelp)
Mixed polymer of mannuronic and guluronic acid
Product order:
Name |
Specifications |
Packing |
Price |
Delivery |
Alginic acid from brown algae |
CP |
500g |
RMB 110 |
Consulting service |
Alginic acid from brown algae |
CP |
2.5kg |
RMB 495 |
Consulting service |
Alginic acid from brown algae |
药用级 |
500g |
RMB 110 |
Consulting service |
Character:
白色到浅黄棕色、无臭、无味的粉末。溶于碱性溶液,微溶于热水,极微溶于冷水及有机溶剂。溶于氢氧化碱金属。3%水溶液pH值1.3~5.5,可吸收200~300倍其重量的水,温暖条件下放置可缓慢分解,分子量变小。
熔点: 300 °C
由海藻制得的一种胶体物质,系β-无水右旋甘露糖醛酸的聚合物。
Quality Standard:
项目 化学纯
(CP)
外观Appearance 白色至淡黄色粉末
红外光谱鉴定Infrared spectrometry 和对照品匹配
含量Assay (羧基基团) (以干基计) 19 - 25 % (滴定分析法)
干燥损失Loss on drying <15 % (2 g, 105°C, 4 小时)
炽灼残渣Res. after ignition <4 %
淀粉 不显蓝色
重金属Heavy metals(as Pb)% ≤0.004%
砷盐Arsonic(As) ≤0.0003%
比旋光度Specific rotation [a]20/D -120.0°~ -140.0°(C=1%, 0.1N NAOH)
Storage:
密封干燥保存。
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