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CAS: 77-09-8
Molecular Formula: C20H14O4
Molecular Weight: 318.32
EINECS: 201-004-7
Storage Period: 1 year
Synonym: 1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-; 1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-; 2,2-bis(p-hydroxyphenyl)phthalide; 3,3-bis(4-Chemicalbookhydroxyphenyl)-1(3h)-isobenzofuranon; alpha-(p-hydroxyphenyl)-alpha-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluicacid; alpha-di-(p-hydroxyphenyl)phthalide; alpha-di(p-hydroxyphenyl)phthalide
Phenolphthalein with CAS 77-09-8 mainly acts on the large intestine, which produces semi-liquid excreta in 4 to 8 hours with little or no colic. The claim that yellow phenolphthalein is three times stronger than white remains unproven. As a result of enterohepatic circulation, the effect of a single dose is sustainable for 3 to 4 days. The drug is an active member of many laxatives that can be sold legally without prescription.
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Mục
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Kỹ thuật
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Đặc
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Bột trắng
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Nhận dạng
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Một: Tích Cực
B: Tích Cực |
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Sự xuất hiện của Giải pháp
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Giải Pháp Là Rõ Ràng Và Không Mạnh Mẽ Hơn Màu Hơn Tài Liệu Tham Khảo Giải Pháp Lớp 7
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Điểm Nóng Chảy
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Nó tan chảy vào khoảng 260 độ
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Liên Quan Chất
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0.5% max
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Kim Loại Nặng
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10ppm max
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Axit hoặc Kiềm
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Phù hợp
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Clorua
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100 trang mỗi phút max
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Sunfat
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200ppm max
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Mất trên làm Khô
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0.5% max
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Sulphated ash
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0.1% max
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Xét nghiệm
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98.0-101.0%(C20H14O4)
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Main uses of phenolphthalein:
1. Pharmaceutical raw materials in the pharmaceutical industry: suitable for habitual and stubborn constipation, available in tablets, suppositories and other dosage forms.
2. Used in organic synthesis: mainly used for synthetic plastics, especially for the synthesis of naphthyridine polyaryl ether ketone polyaryl ether ketone polymers. This type of polymer has excellent heat resistance, water resistance, and chemical resistance. Due to its corrosion resistance, heat aging resistance and good processing and formability, fibers, coatings and composite materials made from it are soon widely used in electronic appliances, mechanical equipment, transportation, aerospace, atomic energy engineering and military fields.
3. Used as acid-base indicator, indicator for titration of non-aqueous solutions, and reagent for chromatographic analysis.
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