Fluorescein 5-isothiocyanate suppliers and prices

Formula: C₂₁H₁₁NO₅S
CAS number: 3326-32-7
Molar mass: 389.40 g/mol

Cheapest by weight

$96.08 per gram

Price per unit, converted to US dollars

At Carbolution Chemicals, Germany

Pack: 5 grams for 430.00 EUR
Grade: Grade not stated · packs of 2 to 10 grams

View at Carbolution Chemicals

Smallest amount to spend

76.80 EUR for 250 milligrams

Total for one pack, in the store's own currency

At Carbolution Chemicals, Germany

Works out at: $343 per gram
Grade: Grade not stated · packs under 0.5 grams

View at Carbolution Chemicals

4 offers from 2 stores · Prices checked October 28 to October 30, 2026 · Prices run from $96.08 to $343 per gram, because a bigger pack costs less per gram.

Show prices per

Every price we found

4 prices, cheapest first

Store	Grade and pack	Price	Link
Carbolution ChemicalsGermanyLowest price	Grade not stated · packs of 2 to 10 grams5 grams for 430.00 EUR	$96.08 per gram	View at store
Carbolution ChemicalsGermany	Grade not stated · packs of 0.5 to 2 grams1 gram for 153.00 EUR	$171 per gram	View at store
Bio BasicCanada	Grade not stated · packs of 0.5 to 2 grams500 milligrams for 199.60 CAD	$286 per gram	View at store
Carbolution ChemicalsGermany	Grade not stated · packs under 0.5 grams250 milligrams for 76.80 EUR	$343 per gram	View at store

Cite these pricesA ready sentence and reference for your report

For your report

As of October 30, 2026, the lowest store price for fluorescein 5-isothiocyanate was $96.08 per gram, converted to US dollars: 5 grams for 430.00 EUR at Carbolution Chemicals.

Reference

APA, 7th edition

ChemicalSuppliers.com. (2026, October 30). Fluorescein 5-isothiocyanate suppliers and prices. Retrieved October 30, 2026, from https://www.chemicalsuppliers.com/fluorescein-5-isothiocyanate/

ACS

Fluorescein 5-isothiocyanate Suppliers and Prices. ChemicalSuppliers.com, October 30, 2026. https://www.chemicalsuppliers.com/fluorescein-5-isothiocyanate/ (accessed 2026-10-30).

BibTeX

@misc{chemicalsuppliers-fluorescein-5-isothiocyanate,
  author  = {{ChemicalSuppliers.com}},
  title   = {{Fluorescein 5-isothiocyanate} suppliers and prices},
  year    = {2026},
  date    = {2026-10-30},
  url     = {https://www.chemicalsuppliers.com/fluorescein-5-isothiocyanate/},
  urldate = {2026-10-30},
  note    = {Prices checked October 30, 2026}
}

Prices change every day, so each line carries the date they were checked.

Making a solution?

Pick the strength and how much you need. We work out the grams of Fluorescein 5-isothiocyanate and what they cost at the cheapest store we track.

Strength

Amount of solution

You need: 389 milligrams; of Fluorescein 5-isothiocyanate, molar mass 389.40 g/mol
That much costs: $37.41; $374.13 per litre of solution, at the lowest price per gram we found
Cheapest way to buy it: $142.89; 1 pack of 500 milligrams at Bio Basic; View at Bio Basic

Weigh it out, dissolve it in less water than you need, then top up to the full amount.

Similar chemicals

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Chemical identity

Formula: C₂₁H₁₁NO₅S
Molar mass: 389.40 g/mol
CAS number: 3326-32-7
InChIKey: MHMNJMPURVTYEJ-UHFFFAOYSA-N
Official record: PubChem 18730

How we compare: each store's own price, turned into US dollars at European Central Bank rates of 2026-10-30, then divided by the pack size. Shipping and tax are not included.