Skip to Content
Merck

Key Documents

View All Documentation

46951

Fluorescein isothiocyanate isomer I

≥97.5% (HPLC)

Synonym(s):

FITC, Fluorescein 5-isothiocyanate

Sign In to View Organizational & Contract Pricing.

Select a Size

Change View

About This Item

Empirical Formula (Hill Notation):
C21H11NO5S
CAS Number:
3326-32-7
Molecular Weight:
389.38
EC Number:
222-042-0
UNSPSC Code:
12171500
PubChem Substance ID:
329757274
Beilstein/REAXYS Number:
1407295
MDL number:
MFCD00005063
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

Quality Level

100

assay

≥97.5% (HPLC)

form

powder

impurities

≤1.5% Isomer II

mp

>360 °C (lit.)

solubility

acetone: soluble 0.1 g/10 mL

fluorescence

λex 492 nm; λem 518 nm (green), λex 492 nm; λem 518 nm in 0.1 M phosphate pH 8.0

storage temp.

2-8°C

SMILES string

Oc1ccc2c(Oc3cc(O)ccc3C24OC(=O)c5cc(ccc45)N=C=S)c1

InChI

1S/C21H11NO5S/c23-12-2-5-16-18(8-12)26-19-9-13(24)3-6-17(19)21(16)15-4-1-11(22-10-28)7-14(15)20(25)27-21/h1-9,23-24H

InChI key

MHMNJMPURVTYEJ-UHFFFAOYSA-N

Application

Reagent for the FITC labeling of proteins; Microsequencing of proteins and peptides (HPLC)

Still not finding the right product?

Explore all of our products under Fluorescein isothiocyanate isomer I

pictograms

Health hazard
GHS08

signalword

Danger

Hazard Classifications

Resp. Sens. 1 - Skin Sens. 1

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

hcodes

H317,H334

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

It looks like we've run into a problem, but you can still download Certificates of Analysis from our Documents section.

If you need assistance, please contact Customer Support

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library