Fluorescein Isothiocyanate

CAS 3326-32-7C21H11NO5S¹389.4 g/mol¹

Chemical Biology Fluorescent Probes

2D Molecular Structure

PubChem CID 18730 ¹

Selected specification: 99% · ACS · SOLID
Selected package basis: 1 g

Safety: WARNING. Development safety data.

Safety & regulatory sources Reference sources

Safety signal: WARNING. Development safety data; independently verify before use.

Regional Index Calculator

Change an input below. Results update instantly.

Interactive

Basis

99% · ACS · SOLID · 1 g

Package count× 1 g

China duty assumption

US additional cost

China freight & handling

US total

$186.00

China total

$98.58

Difference

$87.42

China scenario is lower by $87.42 (47.00%).

Index × package count + your entered adjustments. Research scenario only—not a quotation.

Market Intelligence Snapshot

99% · ACS · SOLID · 1 g · Regional reference indexes

US Regional Index

$186.00

Per 1 g basis

China Regional Index

$98.58

Per 1 g basis

Regional Gap

47%

$87.42 less in China

Updated Aug 21, 2026 · Reference indexes, not supplier quotations

Calculation evidence & references

US index evidence · demo-frontend-v24 observations · 4 eligible suppliers · calculated Aug 21, 2026

China index evidence · demo-frontend-v24 observations · 4 eligible suppliers · calculated Aug 21, 2026

Public market reference channelsAlibaba.com ↗Amazon Business ↗How calculated ↗

Platform links identify public market channels. Exact supplier identities remain private; each displayed value is a GrapeCat Chem regional index, not a platform quote.

12-Month Regional Index History

Confidence: HIGHFreshness: Aug 21, 2026

USD-normalized · 1 g comparison basis

Compressed price scale · omitted empty range: 101.7–162.4

View exact monthly observations →

Latest six exact monthly observations
Region	Mar26	Apr26	May26	Jun26	Jul26	Aug26
US	176.7	178.6	180.4	182.3	184.1	186
CN	93.7	94.6	95.6	96.6	97.6	98.6

Exact monthly observations (12)

Exact monthly observations
	US	China
2025-09-01	165.54000000	87.73620000
2025-10-01	167.40000000	88.72200000
2025-11-01	169.26000000	89.70780000
2025-12-01	171.12000000	90.69360000
2026-01-01	172.98000000	91.67940000
2026-02-01	174.84000000	92.66520000
2026-03-01	176.70000000	93.65100000
2026-04-01	178.56000000	94.63680000
2026-05-01	180.42000000	95.62260000
2026-06-01	182.28000000	96.60840000
2026-07-01	184.14000000	97.59420000
2026-08-01	186.00000000	98.58000000

Exact monthly observations
Region	Sep2025	Oct2025	Nov2025	Dec2025	Jan2026	Feb2026	Mar2026	Apr2026	May2026	Jun2026	Jul2026	Aug2026
US	165.54	167.4	169.26	171.12	172.98	174.84	176.7	178.56	180.42	182.28	184.14	186
China	87.74	88.72	89.71	90.69	91.68	92.67	93.65	94.64	95.62	96.61	97.59	98.58

Published 1y index history · demo-frontend-v2 · basis 1 g · Methodology ↗

Structure, sources & questions

2D Molecular Structure

PubChem CID 18730 ¹

Safety & regulatory sources Reference sources

Development safety data; independently verify before use.

Available Specifications & Package Bases

Normalized specification and package facts from eligible technical documents; source-specific supplier promotion remains private. Each package is an independent research basis. How calculated ↗

99% · ACS · SOLID

1 g

Current basis

US: $186.00
China: $98.58
Gap: 47%; $87.42 less in China

demo-frontend-v2 · 4/4 US/CN observations · calculated Aug 21, 2026

Specification	Package	US Index	China Index	Regional Gap	Confidence	Freshness
99% · ACS · SOLIDDisplayed	1 g	$186.00	$98.58	47%	HIGH	Aug 21, 2026

Reference Data & Physical Properties

Secondary scientific reference values; unavailable fields remain unfilled.

External identifiers

InChIKey: MHMNJMPURVTYEJ-UHFFFAOYSA-N¹
PubChem CID: 18730¹
MDL Number: DEMO-MDL-00001258
SMILES: C1=CC2=C(C=C1N=C=S)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O¹

Applicable physical properties

Form: SOLID

Only source-provided properties applicable to this published basis are shown. Storage and container requirements remain in Safety Summary.

Melting Point: 146 degC
Boiling Point: 218 degC
Density: 1.38 g/mL
Flash Point: 169 degC

Sources (1)[1] PubChem CID 18730Verified 2026-08-17

Classification

Scientific Sourcing Taxonomy

Chemical BiologyFluorescent Probes

Related Chemical Records

Published records from the authoritative scientific sourcing relation.