Molecular weight
From the certificate of analysis or specification. Every panel below uses it.
Mass, volume or concentration
Choose the quantity to solve for and enter the other two.
Solve for
- Mass required
- 1.42 mg
- Amount of substance
- 1 µmol
Mass to moles
The amount of substance in a given mass.
- Amount of substance
- 3.522 µmol
Concentration from absorbance
ε from the sequence, then concentration from the measured absorbance. Mass concentration uses the molecular weight above.
- Coefficient at 205 nm (Anthis & Clore)
- 71,740 M⁻¹ cm⁻¹
- Coefficient at 280 nm (Pace)
- 8,480 M⁻¹ cm⁻¹
For research use only. Not for human or veterinary use. Sold strictly for in-vitro laboratory research; not for diagnosis or treatment.
Molarity calculator by British Peptide Labs (opens in a new tab)