Thymol blue [CAS 76-61-9]

Thymol blue is a reversible pH indicator that responds to the pH of the solution through structural changes of protonation and deprotonation. Thymol blue is red (HI- form) under acidic conditions and blue (I2- form) under alkaline conditions. Quantitative detection is achieved through the absorption peak shift (435 nm/596 nm) of the UV-visible spectrum. Thymol blue selectively responds to pH changes, changing from red to yellow at pH 1.2-2.8 and from yellow to blue at pH 8.0-9.6. Thymol blue can be fixed in a silica gel matrix through sol-gel technology to form a solid-state sensor for in-situ pH measurement in the marine environment and acid-base monitoring in the biomedical field[1][2].

[76-61-9]

C27H30O5S

466.59

O=S1(OC(C2=C(C)C=C(O)C(C(C)C)=C2)(C3=C(C)C=C(O)C(C(C)C)=C3)C4=CC=CC=C41)=O

Fluorescent Dye

10 mM in DMSO

4°C (Powder, protect from light)

Room Temperature

H302, H315, H319, H335

H302, H315, H319, H335