Litmus CAS 1393-92-6 Lacca Coerulea Lacmus Turnsole Lacca Musica

• CAS No.: 1393-92-6
• Formula: (C7h7o4n)N
• EINECS: 215-739-6
• Classification: Organic Analytical Reagents
• Grade: AR
• Specific Usage: For Synthesis
• Model NO.: SUREST-124
• Content: Standard
• Usage: Laboratory Reagents, Analytical Reagents, Diagnostic Reagents, Teaching Reagents
• Source: Dry Powder
• Habit Appellation: Special Reagent
• Application: Industry, Scientific Research, Health, Environmental Protection, Agriculture
• Property: Organic Reagent
• Shelf Life: 2 Years
• Stock: Available
• Molecular Weight: 582.79
• Color: Blue Purple
• Transport Package: 25kg /Drum
• Specification: 98%min
• Trademark: Surest
• Origin: China
• HS Code: 3203001990
• Production Capacity: 1000 Tons Yearly

Product Description

Litmus

 

Name	Litmus
Synonyms	Lacca coerulea; Lacca musica; Lacmus; Lichen blue; Litmus indicator; Litmus paper; Turnsole
CAS Registry Number	1393-92-6
EINECS	215-739-6

Chemical Property/Description

It is a weak organic acid, blue-purple powder, blue pigment extracted from lichens, partially soluble in water and purple, is a commonly used acid-base indicator, the range of discoloration is pH=4.5-8.3 between, under the different effects of acid-base solution conjugate structure changes and discoloration.


Main Uses:

In acidic solutions, molecules are the main form of its existence, giving the solution its red color; (Due to the increase of [H+], the equilibrium shifts to the left) In the alkaline solution, the ionization equilibrium caused by litmus ionization moves to the right, and the acid ion generated by ionization is the main form of its existence, so the solution is blue; (As [OH-] increases, the equilibrium shifts to the right) In a neutral solution, molecules and acid ions coexist, so the solution is purple, that is, it does not change color. ([HZ]=[Z-]) Acid: red pH≤4.5 Weak acid, neutral, weak base: no discoloration 4.5<pH≤8.3 Alkali: blue pH>8.3 All the phenomena that make the acid-base indicator discoloration are chemical changes.