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Methyl Red sodium salt

Product Name
Methyl Red sodium salt
CAS No.
845-10-3
Chemical Name
Methyl Red sodium salt
Synonyms
MR;S NO 250;ACID RED;NR3C2VIT;MethyleRed;C.I. 13020;CI NO 13020;watersoluable;Red sodium saL;Sodiummethylred
CBNumber
CB7112964
Molecular Formula
C15H16N3NaO2
Formula Weight
293.3
MOL File
845-10-3.mol
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Methyl Red sodium salt Property

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
PH
8.2 (10g/l, H2O, 25℃)
PH Range
Red (1.2) to orange (3.4);Red (4.2) to yellow (6.3)
Odor
Odorless
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
CAS DataBase Reference
845-10-3(CAS DataBase Reference)
EPA Substance Registry System
Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-, sodium salt (845-10-3)
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Safety

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 
Yes
HazardClass 
3
PackingGroup 
II
HS Code 
29270000
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H312Harmful in contact with skin

H315Causes skin irritation

H319Causes serious eye irritation

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P321Specific treatment (see … on this label).

P322Specific measures (see …on this label).

P330Rinse mouth.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

P363Wash contaminated clothing before reuse.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
114502
Product name
Methyl Red sodium salt
Purity
ACS reagent, Dye content 95%
Packaging
25g
Price
$72.2
Updated
2025/07/31
Sigma-Aldrich
Product number
114502
Product name
Methyl Red sodium salt
Purity
ACS reagent, Dye content 95%
Packaging
100g
Price
$219
Updated
2025/07/31
Sigma-Aldrich
Product number
1.06078
Product name
Methyl red sodium salt (C.I. 13020)
Purity
water-soluble ACS
Packaging
25g
Price
$663
Updated
2025/07/31
Sigma-Aldrich
Product number
1.06078
Product name
Methyl red sodium salt (C.I. 13020)
Purity
water-soluble ACS
Packaging
100g
Price
$2330
Updated
2025/07/31
TCI Chemical
Product number
M0424
Product name
Methyl Red Sodium Salt
Packaging
1g
Price
$16
Updated
2025/07/31
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Methyl Red sodium salt Chemical Properties,Usage,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

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Methyl Red sodium salt Suppliers

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View Lastest Price from Methyl Red sodium salt manufacturers

Shaanxi Dideu Medichem Co. Ltd
Product
Methyl Red sodium salt 845-10-3
Price
US $0.10-11.00/KG
Min. Order
0.1KG
Purity
99%
Supply Ability
20TONS
Release date
2025-04-23
Hebei Dangtong Import and export Co LTD
Product
Methyl Red sodium salt 845-10-3
Price
US $115.00/kg
Min. Order
100kg
Purity
99.99%
Supply Ability
100Tons
Release date
2023-03-17
Career Henan Chemical Co
Product
Methyl Red sodium salt 845-10-3
Price
US $1.00/KG
Min. Order
1G
Purity
99%
Supply Ability
100KG
Release date
2018-08-13

845-10-3, Methyl Red sodium saltRelated Search:

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