Agar agar
SEAPIDStare
DA5452309
Data11 Iunie 2014
Valoare337,5 RON
Oferta acceptata
Autoritatea contractantaLocalitateBucuresti, Bucuresti
FurnizorTipul contractului-
Cod CPVDescriere: Agar agar
Achizitii337,5 RON
Cantitate: 2
Unitate masura: 500 grame
Agar agar
Agar is the dried, hydrophilic, colloidal substance extracted from
algae known as Agarophytes (several species and genera of the Class
Rhodophyceae). It consists of two polysaccharides, agarose and
agaropectin, in a variable proportions depending on the geographical
zone of origin.
Agar-Agar is a solidifying agent with almost the same gelling strength as
the Bacteriological Agar but with less purification. It has greater opacity
and has a higher salt content. Its use in culture media is recommended
only when transparency and clarity is not a critical requirement.
The most important characteristics are:
Physical data
Melting point 85 ± 5 ºC
Gelling point 35 ± 5 ºC
Gel strength (Nikan) 750 ± 50 g/cm2
Dissolution time (at 100ºC) 1,00 min
Turbidity < 36 NTU
Chemical data
pH of 1,5% solution at 25ºC 6,9 ± 0,1
Particle size < 0,3 mm
Loss on drying < 19,0 % (w/w)
Residue on ignition 6,5 % (w/w)
Acid insoluble ash < 0,5 % (w/w)
Note: Data are average values, which may vary from batch to batch.