Methyl Orange CAS 547-58-0 C. I. 13025 Acid Orange 52

• CAS No.: 547-58-0
• Formula: C14h14n3nao3s
• EINECS: 208-925-3
• Classification: Potassium Hydroxide
• Appearance: Solid
• Grade Standard: Agriculture Grade
• Model NO.: SUREST-75
• Solubleness: Soluble Alkali
• Ionization Capacity: Strong Alkali
• Quality: Superior Grade
• Usage: Industrial Alkali
• Shelf Life: 2 Years
• Stock: Available
• Molecular Weight: 327.33
• Color: Yellow to Orange-Yellow
• Melting Point: 300 ºC
• Transport Package: 25kg or 200 Kg/Barrel
• Specification: 98%min
• Trademark: Surest
• Origin: China
• HS Code: 2927000090
• Production Capacity: 1000 Tons Yearly

Product Description

Methyl Orange
 
 

Name	Methyl Orange
Synonyms	C.I. 13025; Acid Orange 52; Methyl orange sodium salt; Sodium 4-(4-dimethylaminophenylazo)benzenesulphonate
Molecular Structure
Molecular Formula	C14H14N3NaO3S
Molecular Weight	327.33
CAS Registry Number	547-58-0
EINECS	208-925-3

Properties

Melting point	300 ºC

Chemical Property/Description
Methyl orange itself is weakly alkaline, and the discoloration range is between pH 3.1 and 4.4. The color range of methyl orange is red when pH<=3.1, orange when 3.1~4.4, and yellow when pH>=4.4.



Main Uses:
Methyl orange is a commonly used indicator for acid-base titration in analytical chemistry, and is not suitable for titration of organic acid compounds. The pH of aqueous solution with a concentration of 0.1% is 3.1 (red) ~ 4.4 (yellow), which is suitable for titration between strong acid and strong base and weak base. It is also used for spectrophotometric determination  for biological staining.


Methyl orange has been used in laboratory and industrial and agricultural production for pH control of chemical reactions, as well as acid-base titration analysis of chemical products and intermediates. The disadvantage of methyl orange indicator is that the yellow-red color is difficult to identify, and it has been replaced by a wide range of indicators. Methyl orange is also an azo dye that can be used to print and dye textiles.

 

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