Ethyl Orange sodium salt
Ethyl Orange sodium salt (CAS: 62758-12-7) is a valuable pH indicator, identified by its linear formula (C2H5)2NC6H4N=NC6H4SO3Na and a molecular weight of 355.39. This analytical reagent provides a distinct colour change, transitioning from red to orange within the pH range of 3.0 to 4.8. Its primary applications lie in chemical analysis, particularly in titrations and as a general laboratory indicator for pH determination.
- IUPAC
- 4-(4-Diethylaminophenylazo)benzenesulfonic acid sodium salt
- Synonyms
- 4-(4-Diethylaminophenylazo)benzenesulfonic acid sodium salt

pH Indicator
Ethyl Orange sodium salt serves as a visual indicator for acid-base titrations. It exhibits a clear colour transition from red in acidic solutions to orange in neutral or slightly alkaline conditions, enabling precise endpoint determination.
Analytical Chemistry
As an analytical reagent, this compound is employed in various laboratory procedures requiring pH monitoring. Its sensitivity within the 3.0-4.8 pH range makes it suitable for specific analytical applications.
Laboratory Reagent
This chemical is a useful addition to laboratory supplies for educational and research purposes. It facilitates the understanding and practical demonstration of acid-base chemistry and pH measurement principles.
| Molecular weight | 355.39 |
|---|---|
| Linear formula | (C2H5)2NC6H4N=NC6H4SO3Na |
| Grade | indicator grade |
| Composition | Dye content, 90% |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 474 nm |
|---|---|
| Synonym | 3.0 - 4.8, red to orange |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Ethyl Orange sodium salt used for?
+
Ethyl Orange sodium salt is primarily used as a pH indicator, particularly in acid-base titrations. It shows a colour change from red to orange between pH 3.0 and 4.8. It is also used as a general analytical reagent and laboratory indicator.
What are the CAS number and chemical formula for Ethyl Orange sodium salt?
+
The CAS number for Ethyl Orange sodium salt is 62758-12-7. Its linear formula is (C2H5)2NC6H4N=NC6H4SO3Na.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Ethyl Orange sodium salt in indicator grade, with a dye content of approximately 90%.
How should Ethyl Orange sodium salt be handled safely?
+
When handling Ethyl Orange sodium salt, it is advisable to wear eye shields, gloves, and a dust mask (N95 type). Avoid breathing dust and ensure adequate ventilation. It is classified as a warning substance, causing skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335).
Is Ethyl Orange sodium salt a controlled substance?
+
Based on the provided data, Ethyl Orange sodium salt is not listed as a controlled substance.
How can I request a quote or sample of Ethyl Orange sodium salt?
+
To request a quote or sample of Ethyl Orange sodium salt, please contact our sales team through the website or call us directly. We are a global supplier and exporter.
How is Ethyl Orange sodium salt packed and shipped?
+
Ethyl Orange sodium salt is available for export globally. Specific packing and shipping details will be provided upon request and in accordance with international regulations for chemical transport.
▶ Related products

(−)-Curcumol
C15H24O2
Cell Biology
(±) Clopidogrel hydrogensulfate
Cell Biology

(±)-L-Alliin
C6H11NO3S
Cell Biology
(±)-2-Amino-4-phosphonobutyric acid
C4H10NO5P
Cell Biology
(±)-2-Methylarachidonoyl-2′-fluoroethylamide
C23H38NOF
Cell Biology
(±)-3,4-Methylenedioxy-N-ethylamphetamine hydrochloride
Cell Biology

(±)-3,4-Methylenedioxyamphetamine hydrochloride
Cell Biology

(±)-3,4-Methylenedioxymethamphetamine hydrochloride
Cell Biology
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis