• 100% stock solution of silane coated colloidal silica particle along with HEPES based isotonic salts.
  • It is designed to use as a gradient for sperm preparation .
  • Den stock is an optimized (100 %) solution for the preparation of all strength gradient for sperm separation.
  • The Den Stock + Enhance -F can be used in combination for IUI, IVF and ICSI.
  • Any strength of density gradient can be prepared by using Den Stock and Enhance- F
  • Antioxidant —- Taurine
  • Antibiotic —- Gentamicin
  • Nutrition —– Dextrose & Amino acids


  • Color — Hazy but clear
  • PH — 7.2 to 7.4
  • Density — 1.12
  • Sterility — Sterile filtered
  • Sperm survival — 70% survival after 45 minutes of exposure with Den Stock

Please Note

  • Mix Den stock vial by vial inversion 5 times before use.
  • To get the best result use Den stock at 32 Degree – 34 Degree C ( not 37 Degree C )
  • Not for injection.
  • Use prepared density gradient as soon as possible after preparation.

Pre use check

  • Do not use the media if seal is open.
  • Do not use if  there is any flocculation or any suspended particle.

Packing & Self Life

  • 20 X 5 ml glass vial.
  • Pack of 100 ml % 500 ml available on demand.
  • Packed in borosilicate glass vial with silicon cap.
  • Custom pack is available.
  • Self Life — 18 month.


  • Store Den stock vial between 2 – 8 Degree C
  • Take out only the required number of Den stock vials to keep in incubator
  • Use the Den stock under aseptic condition
  • Do not freeze.
  • Once the Den stock vial has been opened or punctured , use all or discard.
  • The product can not be re-sterilized.
  • The product are stable during transport at higher temperature ( 37 Degree C) for 7 days.

48 thoughts on “Den Stock

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