32638-88-3 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 32638-88-3 differently. You can refer to the following data:
1. Also know nas pyrogallol and 1,2,3-trihydroxy-benzene,C6H3(OH)3 is white,lustrous crystals that turn gray on exposure to light. It is soluble in water,alcohol,and ether. A solution of pyrogallol acquires a brown color on exposure to air. This absorption of oxygen and change of color take place rapidly when the solution is made alkaline. Derivation is by heating gallic acid in an autoclave with three times its weight of water.
Uses are as a protective colloid in preparation of metallic colloidal solutions, photography, dyes, intermediates, synthetic drugs, medicine (antibacterial), process engraving, laboratory reagent, gas analysis (an oxygen absorber), reducing agent, and antioxidant in lubricating oils.
2. dark brown powder
Uses
Different sources of media describe the Uses of 32638-88-3 differently. You can refer to the following data:
1. The white powdery crystal was made by the superheating of
gallic acid. Pyrogallic acid, popularly known as pyro, is one of
the earliest developers and its use has spanned three centuries.
It was first used in an acid state to physically develop wet
collodion negatives. When silver bromide gelatin plates were
adopted pyro was used again but in an alkaline state for chemical
development. It was used throughout the 20th century
and often chosen for the peculiar yellow stain it imparted to
gelatin negatives.
2. Pyrogallol Red is a complexometric indicator for the metal elements molybdenum and copper. Dyes and metabolites.
Purification Methods
It is recrystallised from aqueous alkaline solution (Na2CO3 or NaOH) by precipitation on acidification, filter it off and dry in a vacuum. [Suk Collect Czech Chem Commun 31 3127 1966, Beilstein 19 H 407, 19 II 417, 19 III/IV 599, 19/10 V 226.]
Check Digit Verification of cas no
The CAS Registry Mumber 32638-88-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,6,3 and 8 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 32638-88:
(7*3)+(6*2)+(5*6)+(4*3)+(3*8)+(2*8)+(1*8)=123
123 % 10 = 3
So 32638-88-3 is a valid CAS Registry Number.
InChI:InChI=1/C9H12N2O.C6H6O3/c1-11(2)9(12)10-8-6-4-3-5-7-8;7-4-2-1-3-5(8)6(4)9/h3-7H,1-2H3,(H,10,12);1-3,7-9H
32638-88-3Relevant articles and documents
Ti(IV) doping: An effective strategy to boost Lewis acidic performance of ZnO catalyst in fluorescein dye synthesis
Jadhav, Nirajkumar H.,Shinde, Dnyaneshwar R.,Sakate, Sachin S.,Rasal, Nishant K.,Pawar, Ramdas A.
, p. 17 - 22 (2018/11/25)
Zn1-xTixO NPs were efficiently synthesized using a simple solution free mechanochemical method. The synthesized ZnO and Ti(IV)-doped ZnO catalysts are exhibited polycrystallinity, a hexagonal crystal structure, and roughly spherical agglomerates. The surface areas of the Zn1-xTixO catalysts were positively correlated with the doping percentage of Ti(IV), which also enhanced the Lewis acidity of the NPs. The catalysts exhibited excellent activity during the synthesis of fluorescein dyes. This methodology was also extended to sulfone-fluorescein dye synthesis.