Our impurity standard availability information is provided on individual product pages. Though we make every effort to ensure a coninuous supply of our impurities, occasional circumstances may fource us to discountinue or temporarily run out of a product. We sincerely hope you can consult the actual stock before purchasing to avoid unnecessary delay. And if you require additional information on specific products, you may contact our team at order@toref-standards.com. We will get back to you within 24 hours.

These are the recommended storage temperature ranges:
Refrigerator: 0-8°C
-20°C Freezer: -25 to -10°C

All of our impurity standards are intended for RESEARCH USE. The Products will not be used for any other purpose or any purpose whatsoever that violates any law or regulation. Our impurities should only be used by trained scientists working under controlled conditions who are familiar with the potential hazards.