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Solvent Red 23 FAQ: Specifications, Ordering and Support Questions

  • Time of issue:Oct . 29, 2026 00:26
Tangshan Moneide Trading Co., Ltd. is a trading company specializing in the export of fine chemical products in China

(Summary description)Tangshan Moneide Trading Co., Ltd. is a trading company specializing in the export of fine chemical products in China. Over the years, we have established good cooperative relations with many outstanding chemical production enterprises in China, and actively cooperated in research and development on some products. Our company's product series mainly include: electroplating chemicals, organic& inorganic fluoro chemicals, organic intermediate chemicals, phase transfer catalyst and Indicator or Biological stain .

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Tangshan Moneide Trading Co., Ltd.JOURNAL / QUESTIONS & ANSWERS

QUESTIONS & ANSWERS

Solvent Red 23 FAQ: Specifications, Ordering and Support Questions

This FAQ addresses the most common questions buyers and procurement teams ask about solvent red 23 — covering its chemical identity, key specifications, solubility and application profile, how it compares with Solvent Red 24, biological stain use, and practical ordering details. Every answer is drawn from confirmed product data published by Tangshan Moneide Trading Co., Ltd.

Solvent Red 23 FAQ: Specifications, Ordering and Support Questions
AI-generated illustration; not a real product photograph, specification, operating permission or test certificate.
Solvent Red 23 FAQ: Specifications, Ordering and Support Questions

Buyers across the US, Europe, the Middle East and Southeast Asia regularly ask Tangshan Moneide Trading Co., Ltd. about this dye — its identity, purity specifications, solubility, applications, and how it compares with closely related products. The questions below address the most recurring enquiries and answer each one from confirmed product data.


1. What is Solvent Red 23?

This product is a synthetic dye with the chemical name 1-[(4-(Phenylazo)phenyl]azo]-2-naphthol. CAS number: 85-86-9; EINECS number: 201-638-4; molecular formula: C₂₂H₁₆N₄O; molecular weight: 352.40. It appears as a brown-red powder and is classified as an azo solvent dye.


2. What are the key physical and chemical specifications?

Confirmed published specifications:

ParameterValue
AppearanceBrown-red powder
Melting point196–208 °C
Solubility in benzenePasses test
Biological stainPasses test
Sulfated ash0.1% max
Loss on drying0.5% max
Packing25 kg / fibre drum

The dye is insoluble in water and soluble in benzene, chloroform, acetic acid, ethanol, diethyl ether, acetone and petroleum ether.


3. What is it used for?

The confirmed main application is as a biological dyeing agent. The dye is also used as a colorant in fuels, lubricants, waxes and printing inks for packaging and specialty coatings. In plastics manufacturing it is used to tint polystyrene, PVC and other synthetic materials; its oil solubility ensures even distribution in hydrocarbon-based systems.

Due to regulatory restrictions, this dye is intended for industrial and technical use only and is not approved for food-contact or cosmetic applications.


4. What makes it suitable for industrial coloring?

Key features include:

  • High solubility in organic solvents — benzene, chloroform, ethanol, acetone, petroleum ether, acetic acid and diethyl ether
  • Insolubility in water, preventing bleeding or migration in oily and wax-based systems
  • Thermal stability — consistent bright red hue at elevated temperatures (melting point 196–208 °C)
  • Resistance to UV fading under typical industrial exposure conditions
  • Chemical inertness — compatible with various polymers and solvents
  • High tinting strength at low loading levels

5. How does it compare with Solvent Red 24?

Although both are red azo dyes insoluble in water, they differ in several ways:

  • Chemical identity: CAS 85-86-9 (MW 352.40, C₂₂H₁₆N₄O) vs Solvent Red 24 at CAS 85-83-6 (MW 380.45, C₂₄H₂₀N₄O)
  • Melting point: 196–208 °C vs 181–188 °C
  • Solubility: The CAS 85-86-9 grade dissolves in a wider range of solvents — including ethanol, acetone and petroleum ether — whereas Solvent Red 24 has limited solubility in ethanol and acetone
  • Preferred applications: CAS 85-86-9 is often used in petroleum products and inks; Solvent Red 24 is preferred for plastics and synthetic waxes
  • Regulatory profile: The two dyes have differing toxicity profiles, so applicable regulations may vary by country and end-use

6. Can it be used as a biological stain?

Yes. The confirmed product data states that it passes the biological stain test, and biological dyeing agent is listed as the main application. Buyers requiring biological-stain-grade material should confirm that their specific lot meets the biological stain specification before use.


7. What is the standard pack size, and how is the product shipped?

The standard pack is 25 kg per fibre drum. For export shipping details, lead times, minimum order quantities or required documentation, contact Tangshan Moneide Trading Co., Ltd. directly. The company manages international logistics to the US, Europe, the Middle East and Southeast Asia.


All specifications are drawn from the confirmed Tangshan Moneide Trading Co., Ltd. product listing for solvent red 23 (CAS 85-86-9). Specifications are subject to lot-specific testing; request a current technical data sheet or certificate of analysis to confirm values for your order.

THE COMPANY

Tangshan Moneide Trading Co., Ltd.

Tangshan Moneide Trading Co., Ltd. established in 2011, who is specialized in the export of fine chemicals. The company dedicated to the development, production and marketing of chemicals. Moneide covers whole range from small amount (gram grade) for research to big bulk for industrial production. Our products series mainly include electroplating chemicals, organic& inorganic fluoro chemicals, organic intermediate chemicals, phase transfer catalyst and Indicator or Biological stain .…

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