1. Dye Reagents
  2. Tartrazine

Tartrazine (Synonyms: Acid Yellow 23; FD&C Yellow No. 5)

Cat. No.: HY-D0257 Purity: >98.0%
Handling Instructions

Tartrazine is a synthetic lemon yellow azo dye primarily used as a food coloring.

For research use only. We do not sell to patients.

Tartrazine Chemical Structure

Tartrazine Chemical Structure

CAS No. : 1934-21-0

Size Price Stock Quantity
Free Sample (0.5-1 mg)   Apply now  
10 mM * 1 mL in DMSO USD 66 In-stock
Estimated Time of Arrival: December 31
1 g USD 60 In-stock
Estimated Time of Arrival: December 31
5 g   Get quote  
10 g   Get quote  

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Customer Review

Based on 1 publication(s) in Google Scholar

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Tartrazine is a synthetic lemon yellow azo dye primarily used as a food coloring. Tartrazine is water-soluble and has a maximum absorbance in an aqueous solution at 425 nm.

Molecular Weight









Room temperature in continental US; may vary elsewhere


4°C, protect from light

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)

Solvent & Solubility
In Vitro: 

DMSO : 10 mg/mL (18.71 mM; Need ultrasonic and warming)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.8714 mL 9.3570 mL 18.7140 mL
5 mM 0.3743 mL 1.8714 mL 3.7428 mL
10 mM 0.1871 mL 0.9357 mL 1.8714 mL
*Please refer to the solubility information to select the appropriate solvent.
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  • Molarity Calculator

  • Dilution Calculator

The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass   Concentration   Volume   Molecular Weight *
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The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

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