| Identification | More | [Name]
Methyl Red sodium salt | [CAS]
845-10-3 | [Synonyms]
2-[4-(DIMETHYLAMINO)PHENYLAZO]BENZOIC ACID
2-[4-(DIMETHYLAMINO)PHENYLAZO]BENZOIC ACID, SODIUM SALT
4-DIMETHYLAMINOAZOBENZENE-2'-CARBOXYLIC ACID
4-DIMETHYLAMINOAZOBENZENE-2-CARBOXYLIC ACID
4-DIMETHYLAMINOAZOBENZENE-2'-CARBOXYLIC ACID SODIUM SALT
ACID RED
ACID RED 2
ACID RED 2 SODIUM SALT
ACID RED 2, WATER SOLUBLE
CI 13020
CI NO 13020
METHYL RED
METHYL RED ETHANOL
METHYL RED INDICATOR
METHYL RED MIXED SOLUTION
METHYL RED MIXED SOLUTION R
METHYL RED, NEUTRAL
METHYL RED SODIUM SALT
METHYL RED SOLUTION R
METHYL RED, SPIRIT SOLUBLE | [EINECS(EC#)]
212-682-9 | [Molecular Formula]
C15H15N3O2 | [MDL Number]
MFCD00002425 | [Molecular Weight]
269.3 | [MOL File]
845-10-3.mol |
| Chemical Properties | Back Directory | [Appearance]
orange powder | [Melting point ]
178-182 °C | [Boiling point ]
64.7 °C | [density ]
0.791 | [Fp ]
12 °C | [storage temp. ]
Store at RT. | [solubility ]
H2O: soluble
| [Colour Index ]
13020 | [form ]
Solid | [pka]
2.3, 5.0(at 25℃) | [color ]
White to yellow or beige, darkening on exposure to light | [Odor]
Odorless | [PH]
8.2 (10g/l, H2O, 25℃) | [PH Range]
Red (1.2) to orange (3.4);Red (4.2) to yellow (6.3) | [Stability:]
Reported to be unstable, but this is probably a mistake on a commercial MSDS sheet. Incompatible with strong oxidizing agents. | [Water Solubility ]
Soluble in water. Slightly soluble in ethanol. | [λmax]
437nm, 410nm, 493nm | [BRN ]
4065488 | [Major Application]
optical fibers, liquid crystal cells, holography, inks, toner, corrosion inhibitor, detergent | [CAS DataBase Reference]
845-10-3(CAS DataBase Reference) | [EPA Substance Registry System]
845-10-3(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,C,F | [Risk Statements ]
R40:Limited evidence of a carcinogenic effect.
R34:Causes burns.
R11:Highly Flammable. | [Safety Statements ]
S36/37:Wear suitable protective clothing and gloves .
S24/25:Avoid contact with skin and eyes .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S16:Keep away from sources of ignition-No smoking . | [RIDADR ]
UN 1170 3/PG 2
| [WGK Germany ]
3
| [TSCA ]
Yes | [HazardClass ]
3 | [PackingGroup ]
II | [HS Code ]
29270000 |
| Hazard Information | Back Directory | [Chemical Properties]
orange powder | [Uses]
Methyl Red sodium salt is used as a pH indicator. In microbiology, it is used to make agar plates in bacteriology. Further, it is used as a coloring agent and also finds use in mouthwash, toothpaste and in cosmetics. It is also employed as a rocket propellant. In addition to this, it is used in the preparation of reversible stain for rapid detection of stained cells in each specimen. | [General Description]
Methyl red sodium salt is the sodium salt of methyl red synthetic dye, which belongs to the azo group of dyes. | [Biochem/physiol Actions]
Methyl Red is a pH indicator and it changes color at a pH of 5.5. | [Purification Methods]
It can be precipitated from aqueous solution as the free acid which is recrystallised from 95% EtOH, then reconverted to the sodium salt. In H2O it is pink at pH 4.2 and yellow at pH 6.2 and has at 437nm. |
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