Thymolblue
Indicator, ACS, Reag.Ph Eur
Reagent
Code: #127912
CAS Number
76-61-9
science Other reagents with same CAS 76-61-9
blur_circular Chemical Specifications
scatter_plot
Molecular Information
Weight
466.59 g/mol
Formula
C₂₇H₃₀O₅S
badge
Registry Numbers
EC Number
200-973-3
MDL Number
MFCD00005869
inventory_2
Storage & Handling
Storage
Room temperature
description Product Description
Used as a pH indicator in analytical chemistry, particularly in titrations involving weak acids and bases. Thymol Blue exhibits distinct color changes from red to yellow in the pH range of 1.2 to 2.8 and from yellow to blue in the pH range of 8.0 to 9.6, making it suitable for detecting endpoints in acid-base reactions. Commonly employed in educational labs for demonstrating pH transitions and in environmental testing to assess the acidity or alkalinity of water samples. Also utilized in some biological assays where precise pH monitoring is required.
format_list_bulleted Product Specification
| Test Parameter | Specification |
|---|---|
| Appearance | Powder |
| 1st transition range | 1.2-2.8, violet red - brownish yellow |
| 2nd transition range | 7.8-9.5, greenish yellow - blue |
| Absorption maximum λ1 max. (buffer pH 1.2)(nm) | 543-547 |
| Absorption maximum λ2 max. (buffer pH 2.8)(nm) | 431-437 |
| Absorption maximum λ3 max. (buffer pH 7.8)(nm) | 431-437 |
| Absorption maximum λ4 max. (buffer pH 9.5)(nm) | 594-598 |
| Water (by Karl Fischer)(%) | 0-5 |
| Spec. Absorptivity A 1%/1cm (λ1 max;0.01 g/L; buffer pH 1.2;calc. on dried substances) | 580-720 |
| Spec. Absorptivity A 1%/1cm (λ2 max;0.01 g/L; buffer pH 2.8;calc. on dried substances) | 250-370 |
| Spec. Absorptivity A 1%/1cm (λ3 max;0.01 g/L; buffer pH 7.8;calc. on dried substances) | 250-370 |
| Spec. Absorptivity A 1%/1cm(λ4 max;0.01 g/L; buffer pH 9.5;calc. on dried substances) | 580-700 |
| Infrared Spectrum | Conforms to Structure |
shopping_cart Available Sizes & Pricing
Cart
No products
Subtotal:
0.00
Total
0.00
THB
