TDI Diazo Ester Intermediate
1-Naphthalenesulfonic acid, 3-diazo-3,4-dihydro-4-oxo-ar'-(1-methylethyl)[1,1'-biphenyl]-4-yl ester used as synthesis intermediate for advanced photoresists in semiconductor production. Enumerated specifically in HTS 2927.00.18.00 diazo compounds subheading.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If metal coordination complex formation emphasized
Chapter 29 coordination compound note may shift classification to other inorganic compounds if metal-organic bonds predominate.
If classified by urea/imine function over diazo
If imine or urea-function considered principal characteristic per Chapter 29 oxygen/nitrogen function hierarchy.
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Import Tips & Compliance
• Semiconductor industry imports require NIST-traceable purity certificates (>99.5% typically)
• ITAR/EAR export controls may apply to downstream semiconductor uses; verify end-use statements
• Avoid bulk mixture classification—separate pure compounds maintain Chapter 29 status
Related Products under HTS 2927.00.18.00
Norbornane Diazo Ester
1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-,(octahydro-4,7-methano-1H-indene-2,5-diyl) bis-(methylene) ester, a diazo compound featuring norbornane structure used in specialty polymer crosslinking applications. This exact chemical is enumerated in HTS 2927.00.18.00 under diazo compounds of Chapter 29.
Kayacure DIA Photoinitiator
Commercial grade 1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo, ester with phenyl(2,3,4-trihydroxyphenyl)methanone known as Kayacure DIA, used in flexographic printing plates. HTS 2927.00.18.00 covers this exact chemical structure as specified diazo compound.
Naphthol AS Photoinitiator
This is 1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo, ester with phenyl(2,3,4-trihydroxyphenyl)methanone, a diazo compound used as a photoinitiator in printing inks and UV-curable coatings. It falls under HTS 2927.00.18.00 as one of the specifically enumerated diazo compounds in the diazo-, azo- or azoxy-compounds heading of Chapter 29.
Diazo Biphenyl Photoinitiator
1-Naphthalenesulfonic acid, 3-diazo-3,4-dihydro-4-oxo-ar'-(1-methylethyl)[1,1'-biphenyl]-4-yl ester, a specific diazo compound used in photoresist formulations for electronics manufacturing. Classified under HTS 2927.00.18.00 as an explicitly named diazo compound meeting Chapter 29 organic compound criteria.
Benzotriyl Diazo Naphthalenesulfonate
1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, 4-benzoyl-1,2,3-benzenetriyl ester, a complex diazo ester used in advanced photoinitiator formulations for 3D printing resins. Specifically named in HTS 2927.00.18.00 as a diazo compound of Chapter 29 organic chemicals.