China (Mainland)
- Product Details
Keywords
- Agar agar powder
- Agar
- Agar Agar
Quick Details
- ProName: Agar Agar Powder 900
- CasNo: 9002-18-0
- Appearance: white power
- Application: It can be used as a thickener, coagula...
- DeliveryTime: 15 DAYS
- PackAge: BAGS
- Port: shanghai
- ProductionCapacity: 20000 Metric Ton/Day
- Purity: 99.5%～100.5%
- Transportation: SEA
- LimitNum: 1 Metric Ton
Superiority
| ITEM | STANDARD |
| APPEARANCE | Milky or yellowish strip |
| GEL STRENGTH (NIKKAN, 1.5%, 20℃) | > 500 G/CM2 |
| Total Ash | =<1% |
| LOSS ON DRYING | =<12% |
| Residue on Ignition | =< 5% |
| LEAD | =< 5 PPM |
| ARSENIC | =< 1 PPM |
| TOAL HEAVY METALS (as Pb) | =< 10 PPM |
| TOTAL PLATE COUNT | =<10000cfu/g |
| Salmonella | Absent in 25g |
| E.Coli | <3 cfu/g |
| Yeast and Moulds | <500 cfu/g |
Details
The most useful property of agar is that the temperature between its freezing point and melting point varies greatly. It starts to melt when it needs to be heated to 95 ° C in water, and the temperature of the molten solution begins to solidify when it is lowered to 40 ° C, so it is the best coagulant for solid medium preparation. A solid medium prepared in agar can be used for high temperature culture without melting, and the culture is not burned when inoculated before coagulation. Therefore, agar is the most widely used coagulant in the preparation of various biological media. The concentration of agar is usually from 1 to 1.5% of the liquid medium.
How to identify Good Quality agar
Body dry. The color is white, the transparency is high, the elasticity is large, the toughness is strong, and the fastness is strong.
Features of inferior agar
Yellow and dark. It is opaque, has weak elasticity, is hard and hard, and is not tough.
Features of fake agar
The appearance is white and non-glossy, the content of impurities is high, and the transparency is very poor (Note: After the 1% concentration of the aqueous solution is dissolved, a large amount of insoluble matter in water can be found). If soaked in cold or warm water for about 30 minutes, it will quickly recover from water swelling, which is not the case with true agar.