JPS5663965A - Stabilizing method of aqueous solution of urocanic acid - Google Patents
Stabilizing method of aqueous solution of urocanic acidInfo
- Publication number
- JPS5663965A JPS5663965A JP16636379A JP16636379A JPS5663965A JP S5663965 A JPS5663965 A JP S5663965A JP 16636379 A JP16636379 A JP 16636379A JP 16636379 A JP16636379 A JP 16636379A JP S5663965 A JPS5663965 A JP S5663965A
- Authority
- JP
- Japan
- Prior art keywords
- aqueous solution
- acid
- urocanic acid
- urocanic
- stabilizing method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Cosmetics (AREA)
Abstract
PURPOSE: To prepare a stable aqueous solution of urocanic acid usable for a cosmetic having an ultraviolet light absorbing action, by preventing the discoloration of the solution due to the urocanic acid with Na or K salt of tripolyphosphoric acid or tetrapolyphosphoric acid added thereto.
CONSTITUTION: An aqueous solution of urocanic acid in an alkali is mixed with 0.01W1.0wt% one or two or more types of sodium and/or potassium salts of tripolyphosphoric acid or tetrapolyphosphoric acid to prevent the discoloration by light, heat, air, etc. with time into yellow brown to give a stable aqueous solution thereof.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16636379A JPS60352B2 (en) | 1979-12-21 | 1979-12-21 | Stabilization method of uroganic acid aqueous solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16636379A JPS60352B2 (en) | 1979-12-21 | 1979-12-21 | Stabilization method of uroganic acid aqueous solution |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52093096A Division JPS597708B2 (en) | 1977-08-03 | 1977-08-03 | Stabilization method of urocanic acid aqueous solution |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5663965A true JPS5663965A (en) | 1981-05-30 |
JPS60352B2 JPS60352B2 (en) | 1985-01-07 |
Family
ID=15830000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16636379A Expired JPS60352B2 (en) | 1979-12-21 | 1979-12-21 | Stabilization method of uroganic acid aqueous solution |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60352B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4823119A (en) * | 1982-12-22 | 1989-04-18 | Tokyo Shibaura Denki Kabushiki Kaisha | Pattern write control circuit |
-
1979
- 1979-12-21 JP JP16636379A patent/JPS60352B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4823119A (en) * | 1982-12-22 | 1989-04-18 | Tokyo Shibaura Denki Kabushiki Kaisha | Pattern write control circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS60352B2 (en) | 1985-01-07 |
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