o-Cresolphthalein
Molecular Structure:
MDL:
--MFCD00005912
Molecular Formula:
C22H18O4
Molecular Weight:
346.38
Alias:
3,3'-二甲基酚酞,3,3-双(4-羟基-3-甲基苯基)-1(3H)-异苯并呋喃酮
3,3-Bis(4-hydroxy-3-methylphenyl)-1(3H)-isobenzofuranone
Product order:
Name |
Specifications |
Packing |
Price |
Delivery |
o-Cresolphthalein |
AR,醇溶 |
100g |
RMB 83.6 |
Consulting service |
o-Cresolphthalein |
AR,碱溶 |
100g |
RMB 96.8 |
Consulting service |
Character:
白色或红光黄色结晶粉末。溶于乙醇、乙醚、冰醋酸,溶于稀碱呈紫色,微溶于水,难溶于苯。
熔点:223-225℃
Quality Standard:
项目 分析纯
(AR)
外观Appearance 白色至粉色或浅灰色至黄褐色粉末
红外光谱鉴别Infrared spectrometry 和对照品匹配
紫外光谱UV spectrometry 符合
PH变色域Vis. transition interval pH 8.2 (无色) -pH 9.8 (红色)
λ max. 563.0 to 568.0 nm(5 mg/L pH 9.8)
吸光值Absorbance ≥0.590(5 mg/L, pH 9.8, 563.0 to 568.0 nm)
醇溶解试验Solubility in EtOH clear
干燥损失Drying loss ≤ 1.0 %
灼烧残渣Ignition residue(Sulfate) ≤0.1 %
Storage:
密封阴凉干燥保存。
用途 酸碱指示剂,变色范围pH8.2(无色)-9.8(红色)。