One USP trypsin unit is the activity causing a change in absorbance of 0.003 per minute under the conditions specified., Pale to Dark Pink Solution.

• Sterile
• Concentration: 0.05% (w/v) Trypsin (1:250) and 0.02% (w/v) EDTA (Versene)
• Formulation: EDTA 2Na 2H2O: 200.00000 mg/L, Potassium Chloride [KCl]: 400.00000 mg/L, Sodium Bicarbonate [NaHCO3]: 580.00000 mg/L, Sodium Chloride [NaCl]: 8000.00000 mg/L, Dextrose: 1000.00000 mg/L, Phenol Red Sodium Salt: 2.00000 mg/L, Trypsin 1:250: 500.00000 mg/L
• pH: 7.0-7.4
• Foreign Activity: Mycoplasma, Porcine Parvovirus : Not detected
• Osmolality: 270 - 305 mM/kg
• Storage and Handling: -20 °C

Trypsin-EDTA solution is widely used for cell dissociation, routine cell culture passaging, and primary tissue dissociation due to its digestive strength.