Mildly air-unstable, small molecule compounds can be coated with Parabar under an inert atmosphere. The Parabar protected crystal sample can be cryocooled in a chilled nitrogen gas stream. Parabar has also been used successfully as a cryoprotectant for biological macromolecule crystals. Used during cryocrystallography to displace and reduce the amount of water (mother liquor, reagent) on the crystal after the crystal is mounted in a cryoloop. Coating the crystal with Parabar can minimize evaporation from the crystal and reduce exposure and slow diffusion of air (oxygen) to the crystal.

HR2-643 Parabar 10312 is no longer available and has been discontinued effective May 11, 2021.

HR2-862 Parabar 10312 is supplied as 5 ml in an amber glass vial with glass applicator rod in screw cap lid.

The viscosity of Parabar can be reduced to improve handling with fragile needle and blade crystals by mixing 50:50 with Paraffin Oil.

Parabar is a blend of polyisobutylenes with a Staudinger molecular weight of about 20,000 and contains about 20% polymer.

Refractive index 1.48487 at 20°C.

Kinematic viscosity 641 cSt at 100°C. Kinematic viscosity ratio 2.05 at 100°C.

Clear to slightly hazy is appearance.

Synonyms used in the crystallographic literature: Paratone^® N, Paratone^® 8277, Infineum V8512.

Paratone^® is a registered trademark of Chevron Corporation.

Parabar 10312 是一种粘性冷冻保护剂，适用于小分子和大分子晶体学。 1

可以在惰性气氛下用 Parabar 包覆对空气轻微不稳定的小分子化合物。 Parabar 保护的晶体样品可以在冷冻氮气流中进行低温冷却。 Parabar 也已成功用作生物大分子晶体的冷冻保护剂。在晶体安装在低温回路中后，在低温晶体学期间用于置换和减少晶体上的水（母液、试剂）量。用 Parabar 涂覆晶体可以最大限度地减少晶体的蒸发，并减少空气（氧气）向晶体的暴露和缓慢扩散。

HR2-643 Parabar 10312 不再可用，自 2021 年 5 月 11 日起停产。

HR2-862 Parabar 10312 以 5 ml 装在琥珀色玻璃小瓶中，螺旋盖盖中带有玻璃涂抹棒。

通过将 50:50 与石蜡油混合，可以降低 Parabar 的粘度，以改善易碎针状和刀片状晶体的处理。

Parabar 是聚异丁烯的混合物，Staudinger 分子量约为 20,000，含有约 20% 的聚合物。

20°C 时的折射率为 1.48487。

100°C 时运动粘度为 641 cSt。 100°C 时运动粘度比为 2.05。

清晰到略微朦胧的是外观。

晶体学文献中使用的同义词：Paratone® N、Paratone® 8277、润英联 V8512。

Paratone® 是雪佛龙公司的注册商标。