SPQ [6-Methoxy-N-(3-sulfopropyl)quinolinium]

SPQ

6-Methoxy-N-(3-sulfopropyl)quinolinium

A chloride indicator that has the fluorescence dependent of chloride concentration. Its fluorescence is quenched by chloride through collision quenching.

Protocol

SDS

COA

Catalog	Size	Price	Quantity
21252	25 mg	Price

Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of SPQ [6-Methoxy-N-(3-sulfopropyl)quinolinium] to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

	0.1 mg	0.5 mg	1 mg	5 mg	10 mg
1 mM	355.454 µL	1.777 mL	3.555 mL	17.773 mL	35.545 mL
5 mM	71.091 µL	355.454 µL	710.909 µL	3.555 mL	7.109 mL
10 mM	35.545 µL	177.727 µL	355.454 µL	1.777 mL	3.555 mL

Molarity calculator

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

Mass (Calculate)		Molecular weight		Volume (Calculate)		Concentration (Calculate)		Moles
mg	÷	281.33 g/mol	=	mL	x	mM	=	mmol

References

View all 71 references: Citation Explorer

Expression of band 3 protein on erythrocytes of malignant tumor patients and its impact on proliferation of K562 cells

Authors:

Bai SZ, Liu XB, Xi YH, Wang TY, Fu GH.

Journal:

Ai Zheng (2005): 543

Measurement of halide efflux from cultured and primary airway epithelial cells using fluorescence indicators

Authors:

Munkonge F, Alton EW, Andersson C, Davidson H, Dragomir A, Edelman A, Farley R, Hjelte L, McLachlan G, Stern M, Roomans GM.

Journal:

J Cyst Fibros (2004): 171

Halide fluxes in epithelial cells measured with an automated cell plate reader

Authors:

Mahlangu DA, Dix JA.

Journal:

Anal Biochem (2004): 28

Purinergic signaling underlies CFTR control of human airway epithelial cell volume

Authors:

Braunstein GM, Zsembery A, Tucker TA, Schwiebert EM.

Journal:

J Cyst Fibros (2004): 99

Normal function of the cystic fibrosis conductance regulator protein can be associated with homozygous (Delta)F508 mutation

Authors:

Sermet-Gaudelus I, Vallee B, Urbin I, Torossi T, Marianovski R, Fajac A, Feuillet MN, Bresson JL, Lenoir G, Bernaudin JF, Edelman A.

Journal:

Pediatr Res (2002): 628

Physical properties

Molecular weight	281.33
Solvent	DMSO

Spectral properties

Excitation (nm)	317
Emission (nm)	451

Storage, safety and handling

H-phrase	H303, H313, H333
Hazard symbol	XN
Intended use	Research Use Only (RUO)
R-phrase	R20, R21, R22
Storage	Freeze (< -15 °C); Minimize light exposure
UNSPSC	12352200
CAS	83907-40-8

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Page updated on October 15, 2025