Product Description
| 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 to dark blue powder or solid, 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.
Detailed Photos
FAQ
FAQ
Question 1: Can I get samples?
Answer: Yes,you can get free samples of our most products,
while the courier cost will be borne by the buyers.
Question 2: What's your MOQ?
Answer: For a express delivery order,the MOQ is usually 100 g~1 kg;
for an air transport order or sea delivery order ,the MOQ is usually 25 kgs.
Question 3: What's your delivery time?
Answer:
Orders shipped by express delivery,the delivery time is usually 5~7 working days;
Orders shipped by air transport,usually around 7~10 working days;
Orders shipped by sea , usually around 2~3 working weeks.
Question 4: What are the different payment methods?
Answer: We usually accept T/T, L/C and Western Union.
Question 5: How do you treat quality complaint?
We take quality very seriously, it is one of the founding principles of our business.
If the quality problem actually exists, we will replace with qualified goods or refund the money.
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