Most frequently asked questions about agar

What is the difference between Bacteriological Agar, Pharmaceutical Agar, and USP Grade Agar?

The gel strength specifications for bacteriological agar and pharmaceutical agar differ slightly at their extreme ends, however, there is a wide overlap in the middle range. The specifications for these two agars also calls for minor differences in the types of QC tests. Functionally lots of bacteriological and pharmaceutical agar falling within the middle range of gel strength are interchangeable. USP agar conforms with the US Pharmacopeia Standard, for most applications bacteriological and/or pharmaceutical agar is sufficient.

What is Purified Agar? Noble Agar?

Purified Agar, also known a Noble Agar, is a very highly purified specialty agar, practically clear and devoid of any nutritive value or reactive properties by design. Purified agar is typically employed in immunodiffusion studies as well as in the animal and plant cell culture fields.

What is the difference between bacteriological agar and food grade agar?

Bacteriological agar and food grade agar are made from the gelidium and gracelaria species of seaweed respectively. Both seaweeds are red species, however, gelidium grows in much more limited habitats and is consequently more costly than gracelaria. Attempts to grow bacteria on food grade agar (gracelaria) have been generally unsuccessful. 

What is the minimum order quantity?

Our standard peptone packaging is a 50kg fiber drum, smaller 25kg fiber drums and 1kg bottles are available by special requet.

How do I order samples?

Contact your sales representative to order samples. Sample sizes are typically 250g.

What is the maximum lot size?

The maximum lot size is 4,000kgs.

What is the shelf life for agar?

Stored properly, agar can last for 4 years.

What is the lead-time for an order?

Many types of agar are in stock and can ship immediately. Contact your sales representative.