Solvent Red 24

Solvent Red 24

CAS No.: 85-83-6
Molecular Formula: C24H20N4O
Molecular weight: 380.44
Phone :+8617860115079
WhatsApp :+8617860115079
Email :hualuliam@sdhualuchem.com
90c07ac899b1500ecead6a1c8c56591c
product description
Solvent Red 24, also known as Sudan Red Ⅳ, oil soluble red, light red, etc., is chemically 1-(2-methyl-4 -(2-methylphenylazo) phenylazo) -2-naphthol, belonging to the azo dyes with molecular formula C24H20N4O and molecular weight 380.44. The product has good resistance to light, bright and pure color, widely used in a variety of thermoplastic coloring, can also be used for polyester fiber pulp coloring, paint and ballpoint ink coloring


Chemical Properties

PropertyValue

Melting point

199 °C (dec.)(lit.)

Boiling point

260°C

Density

1.1946 (rough estimate)

Vapor pressure

0Pa at 25℃

Refractive index

1.6000 (estimate)

Storage temp.

Flammables area

Solubility

Insoluble in water; soluble in benzene, methanol, acetone, isopropanol; slightly soluble in ethanol

Pka

13.52±0.50(Predicted)

Colour Index

26105

Form

Powder/Solid

Color

Red Brown

Water Solubility

23μg/L at 25℃

ε(extinction coefficient)

≥12000 at 356-360nm in toluene at 0.008g/L≥26000 at 519-523nm in toluene at 0.008g/L

λmax

520 nm, 357 nm

Merck

14,8393

BRN

709018

Stability

Stable. Incompatible with strong oxidizing agents.

Biological Applications

Detecting atherosclerosis; diapers; skin care products; shampoos; hair colors; stents; dental impression materials

InChIKey

RCTGMCJBQGBLKT-PAMTUDGESA-N

LogP

6.66

IARC

3 (Vol. 8, Sup 7) 1987

NIST Chemistry Reference

O-tolylazo-o-tolylazo-beta-naphthol(85-83-6)

EPA Substance Registry System

C.I. Solvent Red 24 (85-83-6)


Safety Information

PropertyValue
Hazard symbolsXi, T
Hazard class codes36/38-45
Safety descriptions26-36-53-45
WGK Germany3
RTECS numberQL5775000
TSCATSCA listed
Hazard classIRRITANT
HS code32129000
Storage class11 - Combustible solids
Hazard class (category)Skin sensitization, Category 1A


Product Usage

Solvent Red 24, also known as Sudan IV, is a versatile oil-soluble azo dye valued for its intense red brightness and excellent solubility in non-polar environments. In the petroleum industry, it is a critical diagnostic tool used to color-code fuels, lubricants, and heating oils for grade identification and tax compliance (such as "red diesel"). Its exceptional thermal stability and compatibility make it a preferred choice in the plastics industry for the transparent coloration of thermoplastic resins like PS, ABS, and PMMA. Additionally, it is widely employed in the wax and coating sectors for manufacturing colored candles, shoe polishes, and solvent-based printing inks. In biomedical research, it serves as a specialized biological stain for identifying lipids and triglycerides in tissue sections.

Factory Showcase
拼图_美图设计室-(1)
Quality Control Lab
实验室
Shipping And Transportation

Delivery Time

Inventory 2-3 working days New manufacturing 7-10 working days

Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
We only provide highest quality goods available, accompanied by after support!

拼图_美图设计室
Qualification Certificate
  • 微信图片_2026-04-22_130717_131
  • 微信图片_2026-04-22_130720_178
  • 微信图片_2026-04-22_130722_820
  • 微信图片_2026-04-22_130725_370
  • 微信图片_2026-04-22_130728_434
  • 微信图片_2026-04-22_130730_803
  • 微信图片_2026-04-22_130733_947
FAQ

Q1: What international standards do your products and services comply with?

A1: Our products fully comply with international standards such as REACH, MSDS, and COA, and we strictly implement the ISO9001 quality management system. We can also provide third-party testing reports (SGS, BV, etc.) according to customer needs.


Q2: How long does it take for goods to be delivered to my country?
A2: The delivery time depends on the transport mode and destination country. Generally, sea transport takes 15-30 days, air transport takes 3-7 days, and we will optimize the transport route to shorten the delivery time as much as possible.


Can you provide customs clearance services for dangerous chemicals?
A3: Yes. Our team is proficient in the customs clearance procedures for dangerous chemicals in various countries, and can provide professional compliant declaration and customs clearance services to ensure smooth customs clearance.


Q4: Do you provide customized product and service solutions?
A4: Yes. We can provide personalized product customization and export service solutions according to your specific needs (product specifications, application scenarios, procurement volume, etc.).

Contact Us
Submit
Recommendation