ChemicalBook >> CAS DataBase List >>Methyl Red sodium salt
Methyl Red sodium salt
- CAS No.
- 845-10-3
- Chemical Name:
- Methyl Red sodium salt
- Synonyms
- MR;ACID RED 2 SODIUM SALT;METHYL RED MIXED SOLUTION R;S NO 250;ACID RED;NR3C2VIT;MethyleRed;C.I. 13020;CI NO 13020;watersoluable
- CBNumber:
- CB7112964
- Molecular Formula:
- C15H16N3NaO2
- Molecular Weight:
- 293.3
- MDL Number:
- MFCD00002426
- MOL File:
- 845-10-3.mol
- MSDS File:
- SDS
- TDS File:
- TDS
Last updated:2026-07-01 11:30:56
| Product description | Number | Pack Size | Price |
| Methyl Red sodium salt ACS reagent, Dye content 95% | 114502 | 25g | $75.2 |
| Methyl Red sodium salt ACS reagent, Dye content 95% | 114502 | 100g | $251 |
| Methyl red sodium salt (C.I. 13020) water-soluble ACS | 1.06078 | 25g | $698 |
| Methyl red sodium salt (C.I. 13020) water-soluble ACS | 1.06078 | 100g | $2440 |
| Methyl Red Sodium Salt | M0424 | 1g | $17 |
| More product size | |||
| Melting point | 178-182 °C |
|---|---|
| Boiling point | 64.7 °C |
| Density | 0.791 |
| bulk density | 360kg/m3 |
| Flash point | 12 °C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: soluble |
| form | Solid |
| pka | 2.3, 5.0(at 25℃) |
| Colour Index | 13020 |
| color | White to yellow or beige, darkening on exposure to light |
| Odor | Odorless |
| PH Range | Red (1.2) to orange (3.4);Red (4.2) to yellow (6.3) |
| PH | 8.2 (10g/l, H2O, 25℃) |
| Water Solubility | Soluble in water. Slightly soluble in ethanol. |
| λmax | 437nm, 410nm, 493nm |
| BRN | 4065488 |
| Stability | Reported to be unstable, but this is probably a mistake on a commercial MSDS sheet. Incompatible with strong oxidizing agents. |
| Major Application | optical fibers, liquid crystal cells, holography, inks, toner, corrosion inhibitor, detergent |
| InChI | 1S/C15H15N3O2.Na/c1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20;/h3-10H,1-2H3,(H,19,20);/q;+1/p-1/b17-16+; |
| InChIKey | GNTPCYMJCJNRQB-CMBBICFISA-M |
| SMILES | [Na+].CN(C)c1ccc(cc1)\N=N\c2ccccc2C([O-])=O |
| CAS DataBase Reference | 845-10-3(CAS DataBase Reference) |
| NCI Dictionary of Cancer Terms | MR |
| FDA UNII | 311GZ0QHWN |
| EPA Substance Registry System | Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-, sodium salt (845-10-3) |
| UNSPSC Code | 12352107 |
| NACRES | NA.47 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H319-H302-H332-H335-H315-H312 | |||||||||
| Precautionary statements | P264-P270-P301+P312-P330-P501-P261-P271-P304+P340-P312-P264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362-P280-P302+P352-P312-P322-P363-P501 | |||||||||
| PPE | Eyeshields, Gloves, type N95 (US) | |||||||||
| Hazard Codes | Xn,C,F | |||||||||
| Risk Statements | 40-34-11 | |||||||||
| Safety Statements | 36/37-24/25-45-36/37/39-26-16 | |||||||||
| RIDADR | UN 1170 3/PG 2 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 3 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29270000 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| NFPA 704 |
|
Methyl Red sodium salt price More Price(62)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 114502 | Methyl Red sodium salt ACS reagent, Dye content 95% | 845-10-3 | 25g | $75.2 | 2026-04-30 | Buy |
| Sigma-Aldrich | 114502 | Methyl Red sodium salt ACS reagent, Dye content 95% | 845-10-3 | 100g | $251 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1.06078 | Methyl red sodium salt (C.I. 13020) water-soluble ACS | 845-10-3 | 25g | $698 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1.06078 | Methyl red sodium salt (C.I. 13020) water-soluble ACS | 845-10-3 | 100g | $2440 | 2026-04-30 | Buy |
| TCI Chemical | M0424 | Methyl Red Sodium Salt | 845-10-3 | 1g | $17 | 2026-04-30 | Buy |
Methyl Red sodium salt Chemical Properties,Uses,Production
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.
Methyl Red sodium salt Preparation Products And Raw materials
Raw materials
Preparation Products
Global( 293)Suppliers
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shaanxi Dideu Medichem Co. Ltd | +86-29-87569262 +86-15003564040 | 1056@dideu.com | China | 3971 | 58 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29812 | 58 |
| Shenyang Simchoice Chemical Co.,Ltd | +86-024-23769576 +86-15040101888 | sales@simchoicechem.com | China | 254 | 58 |
| CONIER CHEM AND PHARMA LIMITED | +8618523575427 | sales@conier.com | China | 49979 | 58 |
| Tangshan Moneide Trading Co., Ltd. | +86-315-8309571 +8615633399667 | sales@moneidechem.com | China | 574 | 58 |
| Career Henan Chemica Co | +86-0371-86658258 +8613203830695 | laboratory@coreychem.com | China | 30224 | 58 |
| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418671 +8618949823763 | sales@tnjchem.com | China | 34563 | 58 |
| Shanghai UCHEM Inc. | +862156762820 +86-13564624040 | sales@myuchem.com | China | 8809 | 58 |
| ANHUI WITOP BIOTECH CO., LTD | +8615255079626 | eric@witopchemical.com | China | 23541 | 58 |
| Finetech Industry Limited | +86-27-8746-5837 +8619945049750 | info@finetechnology-ind.com | China | 9539 | 58 |
Related Qustion
Ask a questionQ:How to prepare a Methyl red sodium salt (C.I. 13020) indicator solution?STAR - Jul 1，2026
A:Dissolve 0.1 g of Methyl red sodium salt in 100 mL of water. Within the pH range of 4.5 to 6.2, the colour of the solution changes from red-violet to brownish-yellow.
View Lastest Price from Methyl Red sodium salt manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-07-01 | Methyl Red sodium salt
845-10-3
|
$115.00 | 100kg | 99.99% | 100Tons | Hebei Dangtong Import and export Co LTD | |
 |
2026-02-02 | Methyl Red sodium salt
845-10-3
|
$1.00-11.00 | 99% | 20TONS | Shaanxi Dideu Medichem Co. Ltd | ||
 |
2019-07-06 | Methyl Red sodium salt
845-10-3
|
$1.00 | 1G | 99% | 100KG | Career Henan Chemical Co |
-
- Methyl Red sodium salt
845-10-3
- $115.00
- 99.99%
- Hebei Dangtong Import and export Co LTD
-
- Methyl Red sodium salt
845-10-3
- $1.00-11.00
- 99%
- Shaanxi Dideu Medichem Co. Ltd
-
- Methyl Red sodium salt
845-10-3
- $1.00
- 99%
- Career Henan Chemical Co
845-10-3(Methyl Red sodium salt)Related Search:
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S NO 250
P-DIMETHYLAMINOAZOBENZENE-O-CARBOXYLIC ACID
O-(P-DIMETHYLAMINOPHENYLAZO)BENZOIC ACID
O-[[P-(DIMETHYLAMINO)PHENYL]AZO]BENZOIC ACID, SODIUM SALT
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Colour Index Number: 13020
METHYL RED SODIUM ACS REAGENT
Methyl red, sodium salt, C.I. 13020, indicator, soluble in water
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METHYL RED, SODIUM SALT, REAGENT (ACS)METHYL RED, SODIUM SALT, REAGENT (ACS)METHYL RED, SODIUM SALT, REAGENT (ACS)
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Methyl red sodium salt (C.I. 13020)
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O-methyl Red Sodium Salt
Methyl Red, sodium salt, pure
MethyleRed
Methyl Red Indicator Solution, 0.02%
Methyl red sodium salt, For ACS analysis
Methyl Red sodium salt, indicator (pH 4.2 - 6.4), ACS reagent
ACID RED 2, WATER SOLUBLE
2-[4-(DIMETHYLAMINO)PHENYLAZO]BENZOIC ACID, SODIUM SALT
CI NO 13020
METHYL RED ETHANOL
METHYL RED INDICATOR
METHYL RED MIXED SOLUTION
METHYL RED, NEUTRAL
METHYL RED SODIUM SALT
METHYL RED SOLUTION R
METHYL RED, SPIRIT SOLUBLE
METHYL RED, WATER SOLUBLE
C.I. 13020~Methyl Red, sodium salt
methyl red sodium crystalline
sodium 2-(p-(dimethylamino)phenylazo)benzoate
METHYLROTNATRIUM INDIKATOR
METHYL RED SODIUM SALT A.C.S. REAGENT
METHYL RED, SODIUM SALT, 0.1WT % SOLUTIO N IN WATER
METHYL RED SODIUM SALT, ACS, WATER SOLUB LE
watersoluable
0.02%w/vaqueoussolution
