METHYL RED ACS GRADE
SKU
RXSOL-69-4935-270
Also known as
METHYL RED (ACS GRADE)
METHYL RED ACS GRADE excellent quality manufacturer, exporter and supplier.
Remarks
| Physical State | Solid |
| Appearance | dark red to purple |
| Odor | none reported |
| pH | Not available |
| Vapor Pressure | Negliglble |
| Vapor Density | Not available |
| Evaporation Rate | Negligible |
| Viscosity | Not available |
| Boiling Point | Not available |
| Freezing/Melting Point | 179-182 deg C |
| Decomposition Temperature | Not available |
| Solubility | Insoluble in water |
| Specific Gravity/Density | Not available |
| Molecular Formula | C15H15N3O2 |
| Molecular Weight | 269.30 |
Note
| Products | : | Methyl Red ACS Reag Ph. Eur , pH indicator |
| C.I. No. | : | 13020 |
| C15H 15N3O2 | : | M.W. 269.30 |
| Absorption maxima | : | |
| 1 (pH 4.5) | : | 523-526 nm |
| 2 (pH 6.2) | : | 427-437nm |
| Clarity of alcohol solution | : | passes test |
| : | ||
| Absorptivity (on dried sub.) | : | |
| (A 1 % 1cm at 1max pH 4.5) | : | 1330 -1430 |
| (A1 %1cm at 2max ph 6.2) | : | 700 - 800 |
| Visual transition | : | From pH 4.2 pink |
| interval | : | to pH 5.5 orange |
| : | to pH 6.2 yellow | |
| Melting point | : | 179 -182 oC |
| Loss on drying (at 1100C) | : | Max. 5.0% |
| : |
| C.A.S. No. | 493-52-7 |
| CI NO. | 13020 |
| M.F. | C15H15N3O2 |
| M.W. | 269.31gm/mole |
Specifications:
|
Thymolphthalein RXSOL-60-6605-733 is a phthalein dye used as an acid–base (pH) indicator. Its transition range is around pH 9.3–10.5. Below this pH, it is colorless; above, it is blue.
OTHER PH INDICATOR:
Phenolphthalein's RXSOL-60-6201-100 common use is as an indicator in acid-base titrations. It also serves as a component of universal indicator, together with methyl red, bromothymol blue, and thymol blue.
Phenolphthalein (pH indicator) indicator range below pH 8.3 above pH 10.0 ::: PINK COLOUR
8.3 ⇌ 10.0
Methyl red RXSOL-69-4935-270 (2-(N,N-dimethyl-4-aminophenyl) azobenzenecarboxylic acid), also called C.I. Acid Red 2, is an indicator dye that turns red in acidic solutions. It is an azo dye, and is a dark red crystalline powder.
Methyl red is a pH indicator;
it is red in pH under 4.4, yellow in pH over 6.2
4.4 ⇌ 6.2
Bromothymol blue RXSOL-60-6295-125 also known as bromothymol sulfone phthalein and BTB
Bromothymol blue is a pH indicator.
it is yellow in pH under 6, Blue in pH over 7.6
6 ⇌ 7.6
it is yellow in pH under 6, Blue in pH over 7.6
6 ⇌ 7.6
