1,1′-Diethyl-4,4′-carbocyanine iodide
1,1′-Diethyl-4,4′-carbocyanine iodide (CAS 4727-50-8) is a cyanine dye with a molecular formula of C25H25IN2 and a molecular weight of 480.38 g/mol. This compound is recognised for its utility as an infrared (IR) dye and is particularly suitable for use as a laser dye, owing to its distinct absorption characteristics in the visible and near-infrared spectrum. Its applications extend into materials science and organic electronics.
- IUPAC
- Cryptocyanine,Kryptocyanine
- Synonyms
- CryptocyanineKryptocyanine

Laser Dyes
This carbocyanine dye is well-suited for application as a laser dye, absorbing light and re-emitting it at longer wavelengths. Its spectral properties make it valuable in various laser technologies.
Infrared (IR) Dyes
The compound functions as an Infrared (IR) dye, absorbing and emitting radiation in the IR region of the electromagnetic spectrum. This characteristic is important for applications requiring IR detection or emission.
Materials Science
It finds application in materials science, where its optical and electronic properties can be exploited for the development of advanced materials. This includes its use in photonic and optical materials.
Organic and Printed Electronics
The dye is relevant in the field of organic and printed electronics, contributing to the development of new electronic devices and components that utilise organic semiconductor materials.
| Molecular weight | 480.38 |
|---|---|
| Empirical formula | C25H25IN2 |
| Assay | 96% |
| Application | Suitable as laser dye |
| Melting point | 250.5-253 °C(lit.) |

Hazard statements
- H300Fatal if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P264Wash thoroughly after handling
- P301IF SWALLOWED
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T+ |
| Risk statements (R) | 28-36/37/38 |
| Safety statements (S) | 26-28-36/37-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 648 nmλmax 703 nm (2nd) |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1,1′-Diethyl-4,4′-carbocyanine iodide used for?
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1,1′-Diethyl-4,4′-carbocyanine iodide is used as an infrared (IR) dye and is particularly suitable as a laser dye. It also finds applications in materials science and organic and printed electronics.
What are the CAS number and formula for 1,1′-Diethyl-4,4′-carbocyanine iodide?
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The CAS number is 4727-50-8 and the empirical formula (Hill notation) is C25H25IN2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,1′-Diethyl-4,4′-carbocyanine iodide with an assay of 96%. TSS does not represent this product as USP, BP, EP, or other pharmacopoeial grades.
What are the safety and handling precautions for this chemical?
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This compound is classified as acutely toxic if swallowed and causes skin and eye irritation, and may cause respiratory irritation. Handling requires appropriate personal protective equipment including eyeshields, face shields, gloves, and respiratory protection (e.g., N100 or P3 filters). Avoid breathing dust/fume/gas/mist/vapours/spray. In case of accidental ingestion, seek immediate medical advice.
How is 1,1′-Diethyl-4,4′-carbocyanine iodide typically packed and exported?
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As a specialist global supplier, Tech Serve Solutions exports chemicals like 1,1′-Diethyl-4,4′-carbocyanine iodide globally. Products are carefully packed in compliance with international shipping regulations for hazardous materials (UN 2811, Class 6.1, PGII).
How can I request a quote or sample?
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To request a quote or a sample of 1,1′-Diethyl-4,4′-carbocyanine iodide, please contact our sales department via the website or provide your details, and a representative will be in touch.
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