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Purity and Price Are Not Correlated!
For example, as shown in our Purity/Price Comparison Table for Rapamycin you
can pay:
- $215 to Abcam for 1 mg of >98% pure rapamycin
- $284 to R&D Systems for 1 mg of >98% pure rapamycin
- $294 to Sigma for 1 mg of 95% pure rapamycin
- $271 to Calbiochem (EMD Millipore) for 1 mg and $508 for 10 mg of 99% pure rapamycin
-OR-
- $48 to LC Labs for 50 mg of >99% pure rapamycin!
Another example is cyclopamine:
- Among the many other cyclopamine suppliers, 4 suppliers charge $65 (98% pure) to $100 (99%) for 10 mg;
- LC Labs' price for 10 mg of >99% pure cyclopamine is $55—$5.50 per mg
The picture is clear -- price tells you nothing about quality.