Agar is a phycocolloid, water soluble polysaccharide, extracted from a group of red-purple marine algae (Class Rhodophyceae) including Gelidium and Graciela. Agar is normally used in final concentration of 1-2% for solidification of culture media. The most important properties of agar are: 1. Good transparency to allow identification of colony type. 2. Consistent gelling (32°C-40°C) and melting (approximately 85°C) temperatures, a property known as hysteresis. 3. Free from toxic substances (bacterial inhibitors).  

Product Quality Specification

Description	Cream colured free flowing powder
Solubility	Completely soluble in boiling water
Colour and Clarity of 1% w/v aqueous	Clear gel
pH after autoclaving :	6.5 ± 1.0
Gelling temperature:	30°C - 40°C

Ash Content:

NMT 10.0%

Loss on Drying (Moisture Content):	NMT 5.0%
Gel firm Test:	Smooth streak line with no cut in agar
Gel melting temperature:	80°C - 90°C

Total microbial count:	Less than 1000 cfu/g
E. coli:, Salmonella,	Absent
Pseudomonas aeruginosa:	Absent
Staphylococcus aureus:	Absent
Gel strength (1.5% gel, at 20° C):	1000 ± 75 G/cm2

 

Storage conditions:Store below 30°C

Shelf Life: 24 Months

Pack sizes: 5kg /25 kg