4-Methoxyphenyl isothiocyanate
4-Methoxyphenyl isothiocyanate (CAS: 2284-20-0, Formula: CH3OC6H4NCS) is an organic compound with a molecular weight of 165.21 g/mol. It is primarily used as a versatile building block in organic synthesis. Its isothiocyanate group readily participates in various chemical reactions, making it valuable for constructing more complex molecular architectures in pharmaceutical research and fine chemical development.

Synthesis of Triazoloquinazolinone Derivatives
4-Methoxyphenyl isothiocyanate serves as a key intermediate in the preparation of novel heterocyclic compounds, such as 3-benzyl-2-(4-methoxyphenyl)-3H-[1,2,4]triazolo-[5,1-b]quinazolin-9-one.
Preparation of N-Arylhydrazinecarbothioamides
This compound is employed in the synthesis of complex hydrazinecarbothioamide derivatives, including 2-{[4-amino-3-(4-methylphenyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl]acetyl}-N-arylhydrazinecarbothioamides.
Organic Synthesis Building Block
As a functionalized isothiocyanate, it is a valuable reagent for introducing the thiocarbamoyl moiety in organic synthesis, facilitating the creation of diverse chemical structures for research.
| Molecular weight | 165.21 |
|---|---|
| Linear formula | CH3OC6H4NCS |
| Assay | 98% |
| Boiling point | 280-281 °C(lit.) |
| Density | 1.196 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.653(lit.) |
| Application | 4-Methoxyphenyl isothiocyanate has been used in the synthesis of:• 3-benzyl-2-(4-methoxyphenyl)-3H-[1,2,4]triazolo-[5,1-b]quinazolin-9-one1• 2-{[4-amino-3-(4-methylphenyl)-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl]acetyl}-N-arylhydrazinecarbothioamides2 |
| Melting point | 18 °C(lit.) |


Hazard statements
- H314Causes severe skin burns and eye damage
- H317May cause an allergic skin reaction
- H334May cause allergy or asthma symptoms if inhaled
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 109 °C / 228.2 °F |
| Transport (UN / ADR) | UN 1760 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34-42 |
| Safety statements (S) | 26-27-28-36-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 4-Methoxyphenyl isothiocyanate used for?
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4-Methoxyphenyl isothiocyanate is utilized as a building block in organic synthesis for creating complex heterocyclic compounds and other specialised organic molecules.
What are the CAS number and chemical formula for 4-Methoxyphenyl isothiocyanate?
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The CAS number is 2284-20-0 and the chemical formula is CH3OC6H4NCS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Methoxyphenyl isothiocyanate with a purity of 98%. We do not represent this product as USP, BP, or EP grade.
How should 4-Methoxyphenyl isothiocyanate be handled safely?
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Handle with care. This compound is classified as corrosive and can cause severe skin burns and eye damage (H314). It may cause an allergic skin reaction (H317) and respiratory sensitisation (H334). Use appropriate personal protective equipment, including gloves, eye protection, and respiratory protection, and ensure adequate ventilation.
Is 4-Methoxyphenyl isothiocyanate a controlled substance?
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The provided data does not indicate that 4-Methoxyphenyl isothiocyanate is a controlled substance.
How can I request a quote or sample of 4-Methoxyphenyl isothiocyanate?
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Please contact our sales team directly via our website or telephone to request a quote or sample.
How is 4-Methoxyphenyl isothiocyanate shipped and exported?
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4-Methoxyphenyl isothiocyanate is classified under UN 1760, Class 8, Packing Group II, and is prepared for safe transport and export according to relevant regulations.
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