Resazurin sodium (Diazoresorcinol sodium) is commonly used to measure bacterial and eukaryotic cell viability through its reduction to the fluorescent product resorufin.

Resazurin sodium (Diazoresorcinol sodium) is commonly used to measure bacterial and eukaryotic cell viability through its reduction to the fluorescent product resorufin. No viable bacteria are detected 24 h post-inoculation following inclusion of Resazurin sodium in TSBc cultures of F. tularensis LVS at the concentration of 44 μM. Lowering the Resazurin sodium concentration to as little as 4.4 μM still results in a 10-fold reduction in viable F. tularensis LVS compare to growth medium alone. Both Resazurin sodium treatments result in a significant decrease in viable F. tularensis LVS bacteria over 22 h. Treatment with Resazurin sodium significantly reduces the number of viable F. tularensis LVS bacteria in HEK293 cells 22 h post-infection^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

251.17

C₁₂H₆NNaO₄

62758-13-8

刃天青钠

Room temperature in continental US; may vary elsewhere.

4deg;C, sealed storage, away from moisture

*In solvent : -80deg;C, 6 months; -20deg;C, 1 month (sealed storage, away from moisture)

In Vitro:;

DMSO : 83.33 mg/mL (331.77 mM; Need ultrasonic)

H₂O : 5 mg/mL (19.91 mM; ultrasonic and warming and heat to 60°C)

*

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)。-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

In Vivo:

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

• 1.

  请依序添加每种溶剂：;10% DMSO ;; 40% PEG300 ;; 5% Tween-80 ;; 45% saline

  Solubility: ≥ 2.08 mg/mL (8.28 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (8.28 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。

  将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液

• 2.

  请依序添加每种溶剂：;10% DMSO ;; 90% (20% SBE-β-CD in saline)

  Solubility: ≥ 2.08 mg/mL (8.28 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (8.28 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中，混合均匀。

  将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明

• [1]. Schmitt DM, et al. The use of resazurin as a novel antimicrobial agent against Francisella tularensis. Front Cell Infect Microbiol. 2013 Dec 6;3:93.

F. tularensis is cultured in TSBc supplemented with 44 μM Resazurin sodium salt at 37°C with shaking for 24 h. At select time points, a Spectronic 200 Spectrophotometer is used to measure the absorbance at 600 nm and 570 nm to detect the presence of Resazurin sodium salt and resorufin, respectively. The ratio of these two optical densities is used to evaluate reduction of Resazurin sodium salt to resorufin over time^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

• [1]. Schmitt DM, et al. The use of resazurin as a novel antimicrobial agent against Francisella tularensis. Front Cell Infect Microbiol. 2013 Dec 6;3:93.