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21932

Sigma-Aldrich

5(6)-Carboxynaphthofluorescein

BioReagent, suitable for fluorescence, ≥90% (HPLC)

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About This Item

Empirical Formula (Hill Notation):
C29H16O7
CAS Number:
128724-35-6
Molecular Weight:
476.43
UNSPSC Code:
12352108
PubChem Substance ID:
329752223
NACRES:
NA.32

product line

BioReagent

Assay

≥90% (HPLC)

form

solid

pKa 

7.6

fluorescence

λex 512 nm; λem 567 nm (acid/neutral)
λex 598 nm; λem 668 nm (basic)

suitability

suitable for fluorescence

SMILES string

OC(=O)c1ccc2c(c1)C(=O)OC23c4ccc5cc(O)ccc5c4Oc6c3ccc7cc(O)ccc67.OC(=O)c8ccc9C(=O)OC%10(c%11ccc%12cc(O)ccc%12c%11Oc%13c%10ccc%14cc(O)ccc%13%14)c9c8

InChI

1S/2C29H16O7/c30-17-4-6-19-14(11-17)1-9-23-25(19)35-26-20-7-5-18(31)12-15(20)2-10-24(26)29(23)22-8-3-16(27(32)33)13-21(22)28(34)36-29;30-17-4-7-19-14(11-17)2-9-22-25(19)35-26-20-8-5-18(31)12-15(20)3-10-23(26)29(22)24-13-16(27(32)33)1-6-21(24)28(34)36-29/h2*1-13,30-31H,(H,32,33)

InChI key

ANUHNEJUELPITC-UHFFFAOYSA-N

Application

5(6)-Carboxynaphthofluorescein (CNF) may be used as an intravesicular pH-sensitive probe for the detection of activity, selectivity and cooperativity of ion channels such as gramicidin A.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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A Song et al.
Analytical chemistry, 69(5), 863-867 (1997-03-01)
A fast and durable ratiometric pH microoptode that is highly accurate, precise, sensitive, reversible, and reproducible over the physiological ranges of pH, ionic strength, and temperature has been developed. The sensing site consists of 5 (and 6)-carboxynaphthofluorescein (CNF) entrapped in
Shannon G Klein et al.
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Anthropogenic nutrient inputs enhance microbial respiration within many coastal ecosystems, driving concurrent hypoxia and acidification. During photosynthesis, Symbiodinium spp., the microalgal endosymbionts of cnidarians and other marine phyla, produce O
M Ramanathan et al.
Biosensors & bioelectronics, 22(12), 3001-3007 (2007-02-03)
The aim of the present work is to develop an evanescence wave array biosensor exploiting the "kinetic" approach of enzymatic reaction and further detection of the reaction products via pH sensitive fluorophore reporter. To demonstrate the feasibility of this approach
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