Sulforhodamine B sodium salt is a fluorescent dye with uses spanning from laser-induced fluorescence (LIF) to the quantification of cellular proteins of cultured cells.
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Signaling Pathways >> Others >> Others
Dye Reagents
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In Vitro
Sulforhodamine B (SRB) is often used as a membrane-impermeable polar tracer or used for cell density determination via determination of cellular proteins (cytotoxicity assay). The SRB assay has been used to inexpensively conduct various screening assays to investigate cytotoxicity in cell based studies. This method relies on the property of SRB, which binds stoichiometrically to proteins under mild acidic conditions and then can be extracted using basic conditions; thus, the amount of bound dye can be used as a proxy for cell mass, which can then be extrapolated to measure cell proliferation. The protocol can be divided into four main steps: preparation of treatment, incubation of cells with treatment of choice, cell fixation and SRB staining, and absorbance measurement. This assay is limited to manual or semiautomatic screening, and can be used in an efficient and sensitive manner to test chemotherapeutic drugs or small molecules in adherent cells. It also has applications in evaluating the effects of gene expression modulation (knockdown, gene expression upregulation), as well as to study the effects of miRNA replacement on cell proliferation[1].
Cell Assay
Gently add 25 μL (96-well format) or 5 μL (384-well format) cold 50% (wt/vol) TCA to each well directly to medium supernatant, and incubate the plates at 4 °C for 1 h. Mixing is not required, as this could lead to some cells detaching from the bottom of the well. Wash the plates four times by submerging the plate in a tub with slow-running tap water and remove excess water by gently tapping the plate into a paper towel. After the last wash allow the plate to air-dry at room temperature. Add 50 μL (96-well format) or 20 μL (384-well format) of 0.04% (wt/vol) SRB solution to each well. Leave at room temperature for 1 h and then quickly rinse the plates four times with 1% (vol/vol) acetic acid (200 μL for 96-well format or 30 μL for 384-well format) to remove unbound dye. Allow the plate to air-dry at room temperature[1].
References
[1]. Orellana EA, et al. Sulforhodamine B (SRB) Assay in Cell Culture to Investigate Cell Proliferation. Bio Protoc. 2016 Nov 5;6(21). pii: e1984.
Chemical & Physical Properties
Molecular Formula
C27H29N2NaO7S2
Molecular Weight
580.65
PSA
150.78000
LogP
7.81310
Water Solubility
methanol: 1 mg/mL
MSDS
Acid Red 52 MSDS(Chinese)
Toxicological Information
CHEMICAL IDENTIFICATION
RTECS NUMBER :
BP6750000
CHEMICAL NAME :
Ammonium, (6-(diethylamino)-9-(2,4-disulfophenyl)-3H-xanthen-3- ylidene)diethyl-, hydroxide, inner salt, sodium salt
CAS REGISTRY NUMBER :
3520-42-1
LAST UPDATED :
199701
DATA ITEMS CITED :
5
MOLECULAR FORMULA :
C27-H29-N2-O7-S2.Na
MOLECULAR WEIGHT :
580.69
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
10300 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
MUTATION DATA
TYPE OF TEST :
Cytogenetic analysis
TEST SYSTEM :
Rodent - hamster Fibroblast
DOSE/DURATION :
13100 mg/L
REFERENCE :
FCTOD7 Food and Chemical Toxicology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.20- 1982- Volume(issue)/page/year: 22,623,1984 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - M2208 No. of Facilities: 114 (estimated) No. of Industries: 5 No. of Occupations: 7 No. of Employees: 901 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - M2208 No. of Facilities: 2248 (estimated) No. of Industries: 47 No. of Occupations: 51 No. of Employees: 75084 (estimated) No. of Female Employees: 12598 (estimated)
2921499090 other aromatic monoamines and their derivatives; salts thereof VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%
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Synonyms
4'-Butoxy-3-piperidinopropiophenone hydrochloride
Tanaclone
EINECS 222-529-8
dyclonine hydrochloride
SULFORHODAMINE B
MFCD00010180
C.I. 45100
Xanthylium, 3,6-bis(diethylamino)-9-(2,4-disulfophenyl)-, inner salt, sodium salt (1:1)
Henan Fengda Chemical Co., Ltd. is located in the High-tech Development Zone of Henan Province. Specializing in the production and sales of various fine chemical products required for industrial production, including chemical raw materials, organic raw materials, petrochemicals, chemical reagents, solvents, catalysts, and additives, etc.
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CAS#:62796-29-6
