Methyl Orange Indicator 25g Merck, Germany

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Price :

৳750

Size :

  • 25 gm

Estimated Shipping Time: Deliveries take up to 4-5 days after you place your order

Uses: Laboratory and scientific purposes

Product SKU: hYD92686xS


Methyl orange (C.I. 13025) indicator ACS, Reag. Ph Eur

  • Formula: C14H14N3Na)3S
  • Molecular Weight: 327,34g/mol
  • Synonyms: 4-Dimethylaminoazobenzene-4′-sulfonic acid sodium salt, Gold orange, Helianthine, Orange II
  • HS Code: 2927 00 00
  • Made in Germany

Structure Formula:
Structure formula Image 
Application :

  • Acid-Base Titrations: Methyl orange is widely employed in acid-base titrations to determine the endpoint of the titration. The color change of the indicator provides a visual signal indicating when the solution has shifted from acidic to neutral or alkaline conditions.

  • pH Monitoring: Methyl orange can be used for qualitative pH monitoring of solutions in the laboratory. By observing the color change, researchers can estimate the pH of a solution within the suitable pH range of the indicator.

  • Quality Control: In certain industries and laboratories, Methyl Orange Indicator may be used for quality control purposes where monitoring and controlling the acidity or alkalinity of solutions is critical.

  • Research Applications: Researchers may use methyl orange in various experiments and research projects where pH changes need to be detected or controlled within the indicator's effective pH range.


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  1. Chemical Structure: Methyl Orange is a pH indicator with the chemical formula C14H14N3NaO3S.

  2. Color Change: It undergoes a distinct color change in response to changes in pH. In acidic solutions, it appears red, while in alkaline solutions, it turns yellow.

  3. pH Range: Methyl Orange is particularly useful in the pH range of approximately 3.1 to 4.4. It is commonly employed in titrations involving strong acids and weak bases.

  4. Transition Range: The range over which the color change occurs is known as the transition range. For Methyl Orange, this transition occurs in the acidic range.

  5. Usage in Titration: Methyl Orange is often used in acid-base titrations due to its sharp color change at the equivalence point, making it easier for the observer to detect the endpoint of the titration.

  6. Water Solubility: Methyl Orange is soluble in water, facilitating its use in aqueous solutions.

  7. Sensitivity to Carbon Dioxide: It is sensitive to the presence of carbon dioxide (CO2), and in the presence of carbon dioxide, it may give a red color, complicating its use in certain situations.

  8. Photodegradation: Methyl Orange can be susceptible to photodegradation when exposed to light for extended periods, which can affect its accuracy and reliability.

  9. Laboratory Safety: While Methyl Orange itself is not highly toxic, standard laboratory safety practices should be followed, and contact with skin or eyes should be avoided.

  10. Alternative Indicators: Depending on the specific requirements of an experiment, scientists may choose alternative indicators, such as phenolphthalein or bromothymol blue, which have different pH ranges and transition points.

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