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Trypan Blue, sodium salt *CAS 72-57-1*

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Physical properties
Molecular weight960.81
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageRoom temperature (10-25 °C); Minimize light exposure


Molecular weight
Trypan blue, a diazo dye is a vital stain that colors dead tissues or cells blue. Live cells or tissues with intact cell membranes are not be colored. Since cells are very selective in the compounds that pass through the membrane, in a viable cell trypan blue is not absorbed; however, it traverses the membrane in a dead cell. Hence, dead cells are shown as a distinctive blue color under a microscope. Trypan blue is commonly used in microscopy (for cell counting) and in laboratory mice for assessment of tissue viability. The method cannot distinguish between necrotic and apoptotic cells. It is also useful to observe hyphea of fungi and Stramenopiles.

Example protocol


Important notes
It is important to store at room temperature.

It can be used within 6 months from the date of receipt.

Cat. #

                      Product Name

  Unit Size


      Trypan Blue, sodium salt *Cell culture tested*

  100 g


       Trypan Blue, sodium salt *UltraPure  grade* *Purified to eliminate fluorescent impurities*

  10 g


     Trypan UltraBlue™, sodium salt *0.1 M aqueous solution*

  1 mL


     Trypan Red Plus™ *0.1 M aqueous solution*

  10 mL


     Trypan Red Plus™ *0.1 M aqueous solution*

  100 mL


    Trypan Purple™ *0.1 M aqueous solution*

  10 mL


    Trypan Purple™ *0.1 M aqueous solution*

  100 mL


Common stock solution preparation

Table 1. Volume of Water needed to reconstitute specific mass of Trypan Blue, sodium salt *CAS 72-57-1* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

0.1 mg0.5 mg1 mg5 mg10 mg
1 mM104.079 µL520.394 µL1.041 mL5.204 mL10.408 mL
5 mM20.816 µL104.079 µL208.158 µL1.041 mL2.082 mL
10 mM10.408 µL52.039 µL104.079 µL520.394 µL1.041 mL

Molarity calculator

Enter any two values (mass, volume, concentration) to calculate the third.

Mass (Calculate)Molecular weightVolume (Calculate)Concentration (Calculate)Moles



View all 106 references: Citation Explorer
Effect of trypan blue staining on the density and viability of lens epithelial cells in white cataract
Authors: Nanavaty MA, Johar K, Sivasankaran MA, Vasavada AR, Praveen MR, Zetterstrom C.
Journal: J Cataract Refract Surg (2006): 1483
A prospective study on trypan blue capsule staining under air vs under viscoelastic
Authors: Wong VW, Lai TY, Lee GK, Lam PT, Lam DS.
Journal: Eye (2006): 820
Hypothermia of 8 degrees C protects cultured retinal pigment epithelial cells and retinal ganglion cells against trypan blue toxicity
Authors: Kunikata H, Abe T, Murata H, Sagara Y, Wakusawa R, Sato H, Yoshida M, Fuse N, Tamai M.
Journal: Am J Ophthalmol (2006): 754
Toxic effects of indocyanine green, infracyanine green, and trypan blue on the human retinal pigmented epithelium
Authors: Kodjikian L, Richter T, Halberstadt M, Beby F, Flueckiger F, Boehnke M, Garweg JG.
Journal: Graefes Arch Clin Exp Ophthalmol (2005): 917
Trypan blue: effect on retinal pigment epithelial and neurosensory retinal cells
Authors: Narayanan R, Kenney MC, Kamjoo S, Trinh TH, Seigel GM, Resende GP, Kuppermann BD.
Journal: Invest Ophthalmol Vis Sci (2005): 304
Establishment and optimization of a flow cytometric method for evaluation of viability of CD34+ cells after cryopreservation and comparison with trypan blue exclusion staining
Authors: Humpe A, Beck C, Schoch R, Kneba M, Horst HA.
Journal: Transfusion (2005): 1208
Trypan-blue- and endoillumination-assisted phacoemulsification in eyes with vitreous hemorrhage during combined cataract and vitreous surgery
Authors: Yamamoto N, Ozaki N, Murakami K.
Journal: Ophthalmologica (2005): 338
Trypan blue identifies antimetabolite treatment area in trabeculectomy
Authors: Healey PR, Crowston JG.
Journal: Br J Ophthalmol (2005): 1152
Neurotoxic effects of trypan blue on rat retinal ganglion cells
Authors: Jin Y, Uchida S, Yanagi Y, Aihara M, Araie M.
Journal: Exp Eye Res (2005): 395
Safety of trypan blue 1% and indocyanine green 0.5% in assisting visualization of anterior capsule during phacoemulsification in mature cataract
Authors: Chung CF, Liang CC, Lai JS, Lo ES, Lam DS.
Journal: J Cataract Refract Surg (2005): 938