For research use only.

Catalog No.S2540 Synonyms: Vitamin B2

Riboflavin Chemical Structure

CAS No. 83-88-5

Riboflavin (Vitamin B2) is an easily absorbed micronutrient with a key role in maintaining health in humans and other animals.

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Biological Activity

Description Riboflavin (Vitamin B2) is an easily absorbed micronutrient with a key role in maintaining health in humans and other animals.



Solubility (25°C)

In vitro DMSO 0.1 mg/mL (0.26 mM)
Water Insoluble
Ethanol Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 376.36


CAS No. 83-88-5
Storage powder
in solvent
Synonyms Vitamin B2
Smiles CC1=CC2=C(C=C1C)N(C3=NC(=O)NC(=O)C3=N2)CC(C(C(CO)O)O)O

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)
Dosage mg/kg Average weight of animals g Dosing volume per animal ul Number of animals
Step 2: Enter the in vivo formulation ()
% DMSO % % Tween 80 % ddH2O

Bio Calculators

Molarity Calculator

Molarity Calculator

Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:

Mass (mg) = Concentration (mM) × Volume (mL) × Molecular Weight (g/mol)

  • Mass
    Molecular Weight

*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).

Dilution Calculator

Dilution Calculator

Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:

Concentration (start) x Volume (start) = Concentration (final) x Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )

  • C1

* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).

The Serial Dilution Calculator Equation

  • Serial Dilutions

  • Computed Result

  • C1=C0/X C1: LOG(C1):
    C2=C1/X C2: LOG(C2):
    C3=C2/X C3: LOG(C3):
    C4=C3/X C4: LOG(C4):
    C5=C4/X C5: LOG(C5):
    C6=C5/X C6: LOG(C6):
    C7=C6/X C7: LOG(C7):
    C8=C7/X C8: LOG(C8):
Molecular Weight Calculator

Molecular Weight Calculator

Enter the chemical formula of a compound to calculate its molar mass and elemental composition:

Total Molecular Weight: g/mol

Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2

Instructions to calculate molar mass (molecular weight) of a chemical compound:

To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.

Definitions of molecular mass, molecular weight, molar mass and molar weight:

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

Molarity Calculator

Mass Concentration Volume Molecular Weight

Clinical Trial Information

NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04641663 Not yet recruiting Dietary Supplement: Multi-target Dietary Supplement (MTDS) Aging|Age-related Cognitive Decline Douglas Boreham|McMaster University|Northern Ontario School of Medicine January 4 2021 Not Applicable
NCT04567823 Recruiting Dietary Supplement: Smoothie with microalgae Nutrient Deficiency University of Jena|German Federal Ministry of Education and Research November 9 2020 Not Applicable
NCT03278886 Completed Drug: Low dose naltrexone|Drug: Nalmefene HIV Infection|Alcohol Use|Pain Boston Medical Center|National Institute on Alcohol Abuse and Alcoholism (NIAAA) July 3 2018 Phase 1|Phase 2
NCT03151096 Terminated Dietary Supplement: Riboflavin|Dietary Supplement: Placebo High Blood Pressure|MTHFR C677T Genotype London School of Hygiene and Tropical Medicine|University of Ulster May 2 2018 Not Applicable

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID