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Agar, 6 g, dehydrated

Ages 12+
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Use this agar powder with water to create your own pure agar base! (no nutrients added) Read More

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Add water to this agar powder and sterilize it, if desired, for a pure agar base (no nutrients added). This container makes about 200 ml of agar solution - enough to cover 15 standard 90-100 mm petri dishes (not included).

Formula (C12H18O9)x
Form Powder
CAS # 9002-18-0
DOT Classification Non-Regulated
Storage Code Green


Try This Fun Recipe: *Makes 100 ml of nutrient agar solution - enough to cover 7-9 standard 90-100 mm petri dishes.

  • Mix 1 level teaspoon of dehydrated agar with 100 ml (3/8 cup) of room-temperature water.
  • Bring to a boil while stirring to ensure the agar is completely dissolved.
  • Pour 10-12 ml of hot agar into each petri dish, just covering the bottom.
  • Replace the dish top immediately after pouring to prevent contamination.
  • Let dishes stand for 1 hour, allowing agar to solidify. 


  • This agar can be sterilized in a pressure cooker before pouring into the sterile plastic dishes. Use 15 lb. pressure for 15 minutes.
  • This agar does not have nutrients added to it; however, since it's an organic substance (made from seaweed), it's a medium that encourages bacteria growth. You can mix a little chicken broth with the agar if you want to add more nutrients!
  • We provide more information about how to use agar & petri dishes


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