Plastic Article or Part of an Analyser? A Case Study on Note 2(b) to Chapter 90

Is a single-use plastic micro-cuvette a plastic article or a part of an analyser? A case study on Note 2(b) to Chapter 90, 9027 vs 3926, and how a ₹7.77 crore customs demand was set aside.

Case: Syndicate Diagnostics (P) Ltd. v. Commissioner of Customs, Chennai-II (Import) Forum: Customs, Excise and Service Tax Appellate Tribunal (CESTAT), Chennai Reference: Customs Appeal No. 40503 of 2024, Final Order No. 41032/2026, decided 22 September 2026

At a glance

Point	Detail
Goods	Single-use micro-cuvettes for a blood coagulation analyser: a sealed plastic body with a small steel ball inside
Importer’s classification	Tariff item 9027 9090 (HS subheading 9027.90)
Revenue’s classification	Tariff item 3926 9099 (HS subheading 3926.90)
Deciding provision	Note 2(b) to Chapter 90
Result	Appeal allowed; 9027 9090 upheld
Amount at stake	₹7,77,41,740, excluding interest
Amount payable after appeal	Nil

1. Why this case matters

Laboratories run on single-use items made for one machine: cuvettes, cartridges, tips and test strips. They are usually plastic and are usually described by their makers as “disposables”. That description invites a simple argument from the customs side: a disposable is a consumable, a consumable is not a machine part, and a plastic thing that is not a machine part belongs in Chapter 39.

This decision tests that argument and rejects it on the facts. It is a useful study because the dispute is narrow and the answer comes from a single Chapter Note. It shows how much turns on what an article does, as opposed to what it is made of or how it is labelled.

2. The goods

The goods were micro-cuvettes imported for use with one manufacturer’s coagulation analysers. The Tribunal recorded these facts:

Construction: each is a sealed cartridge assembly, a plastic body with a small steel ball enclosed inside.
Design: the dimensions, configuration and construction are designed for that particular analytical system. They are not ordinary sample vessels capable of general laboratory use.
Function: the cuvette holds the plasma sample. The analyser controls the steel ball magnetically. As the plasma coagulates, fibrin strands form and the ball stops rotating. The analyser’s sensing system detects the change and determines the coagulation time.
Exclusive use: the Revenue did not establish any practical use with any other instrument.
Life: each cuvette is used once and then discarded.

3. Timeline

December 2018 onward: 35 shipments were imported. The importer self-assessed and cleared them as parts of the analyser under 9027 9090.
Post-clearance audit: Customs Audit objected that the cuvettes are disposable consumables, cannot be machine parts, and are therefore general plastic articles under 3926 9099, which carries a higher duty.
18 December 2023: show cause notice issued.
15 May 2024: Order-in-Original reclassified the goods under 3926 9099 and confirmed the demand.
30 March 2026: appeal heard by a two-member Bench (one Judicial, one Technical).
22 September 2026: appeal allowed.

4. The question

Are the micro-cuvettes merely articles of plastics classifiable under heading 39.26, or are they parts or accessories of the coagulation analyser, classifiable with it under heading 90.27 by Note 2(b) to Chapter 90?

5. The competing provisions

Heading 90.27

Instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes.

Subheading 9027.90 reads “Microtomes; parts and accessories”.

Heading 39.26

Other articles of plastics and articles of other materials of headings 39.01 to 39.14.

Subheading 3926.90 reads “Other”.

Note 2 to Chapter 90

Subject to Note 1 above, parts and accessories for machines, apparatus, instruments or articles of this Chapter are to be classified according to the following rules:

(a) Parts and accessories which are goods included in any of the headings of this Chapter or of Chapter 84, 85 or 91 (other than heading 84.87, 85.48 or 90.33) are in all cases to be classified in their respective headings;

(b) Other parts and accessories, if suitable for use solely or principally with a particular kind of machine, instrument or apparatus, or with a number of machines, instruments or apparatus of the same heading (including a machine, instrument or apparatus of heading 90.10, 90.13 or 90.31) are to be classified with the machines, instruments or apparatus of that kind;

6. The Revenue’s case for 39.26

Function: the cuvette only holds the sample. The analyser performs the analysis.
Trade description: the manufacturer’s literature lists the goods as single-use disposables or consumables, not among the spare parts or sub-assemblies of the analyser.
Not a part: a part must be an integral constituent of an assembly, without which the machine is incomplete. The analyser is a complete instrument without a cuvette, and the cuvette is not fitted into it.
Not an accessory: it does not meet the tests for an accessory either.
Threshold point: Note 2 to Chapter 90 applies only after goods are found to be parts or accessories.
Material: the plastic body gives the essential character. The steel ball changes this no more than a metal handle changes a plastic basket.
Misdeclaration: the supplier’s invoice said only “cuvette”; the importer added “spare parts for coagulation analyser” in the Bills of Entry. This was said to justify the extended period, penalty and confiscation.

7. The importer’s case for 90.27

Design and exclusivity: the cuvettes are patented, made exclusively for these analysers and have no general use.
Functional role: the cuvette and its steel ball interact with the analyser’s magnetic and sensing systems. The analyser cannot perform the intended test without them.
Durability is not a test: the tariff does not require a part to be durable hardware. A supplier’s description of “disposables” does not exclude part status.
Chapter Notes: heading 90.27 covers instruments for physical or chemical analysis, including viscosity-measuring instruments, and Note 2(b) brings identifiable parts and accessories into the same heading.
Specific over general: heading 90.27 read with the Note is specific; heading 39.26 is residuary.
Good faith: the dispute is a bona fide classification question, the goods were correctly described, and clearances were accepted for years.

8. How the Tribunal reasoned

Foreign rulings set aside. Both sides cited overseas rulings. The Tribunal declined to examine them: they were private rulings, and nobody had shown that the tariffs they rested on were in pari materia with the Indian tariff.

The cuvette is not a passive container. Its construction, including the steel ball, participates in the analytical process. Without the micro-cuvette the analytical process would not be complete.

Note 2(b) does not require permanent fitting. The Note asks whether the article is a part or accessory suitable for use solely or principally with a particular kind of instrument. That the analyser remains physically intact when the cuvette is removed does not make the cuvette a generic consumable.

The right question about necessity. The question is not whether the analyser can be physically switched on without a cuvette inserted, but whether the article is an essential component for the intended analytical operation. Applying the tests the Revenue itself relied on, the answer supported the importer.

“Disposable” and “consumable” are not synonyms. “Disposable” describes an article’s intended life or use-cycle. “Consumable” describes an article that is used up, exhausted, consumed, or that loses its identity in operation. Single use, short durability or discard after use does not by itself make an article a consumable or exclude it from being a part or accessory. Commercial descriptions such as “disposable” or “consumable” are not determinative.

The steel ball is not a handle. It is not an incidental addition. Its magnetically controlled movement forms part of the mechanism by which the coagulation time is determined, so the article must be considered in its entirety.

Material does not decide where a specific provision applies. Heading 39.26 is a residuary entry for other articles of plastics. Where the article is covered by a specific provision read with the relevant Chapter Note, resort to the residuary heading is not warranted. The Tribunal added that its conclusion did not rest merely on a comparison of descriptions; it followed from the statutory rule in Note 2(b).

Earlier decisions. The Tribunal drew support from earlier decisions treating specially prepared chromatography sheets and single-use blood-gas cartridges as classifiable with their analytical instruments under heading 90.27, and from a Board circular classifying disposable dialyzers by their function. The Revenue’s laboratory-ware precedent was distinguished because the goods there were materially different.

9. The decision

The Tribunal held that the micro-cuvettes are identifiable and functionally integrated parts/accessories, suitable for use solely or principally with the coagulation analyser. By Note 2(b) to Chapter 90 they are classifiable with the instrument under heading 90.27, and the importer’s classification under 9027 9090 was sustained.

The first order had imposed:

differential duty of ₹3,38,70,870, with interest
an equal penalty of ₹3,38,70,870
a redemption fine of ₹1,00,00,000

That is ₹7,77,41,740 before interest. With the reclassification set aside, the duty demand and interest fell, and the Tribunal held that the question of penalty, confiscation and redemption fine did not arise.

10. Reading the decision against the Harmonized System

The result can be reached in a short path through the HS text.

GRI 1. Classification is determined by the terms of the headings and any relative Section or Chapter Notes. The analysis starts and ends here; no later Rule is needed.
Note 2(a) to Chapter 90. The cuvette is not itself an article of any heading of Chapter 84, 85, 90 or 91, so it does not go to a heading of its own.
Note 2(b) to Chapter 90. If it is a part or accessory suitable for use solely or principally with instruments of one heading, it is classified with them. The analyser is an instrument of heading 90.27, so the cuvette goes to heading 90.27.
Note 2(c) does not arise, because 2(b) is satisfied.
GRI 6. Within heading 90.27, parts and accessories fall in subheading 9027.90.

Two further points in the HS text are consistent with the outcome, although the Tribunal did not rely on them:

Note 2(u) to Chapter 39 states that Chapter 39 does not cover “Articles of Chapter 90 (for example, optical elements, spectacle frames, drawing instruments)”. Once an article is a part or accessory classified in Chapter 90, Chapter 39 excludes it by its own terms.
The Explanatory Notes to Chapter 90 state that, subject to Chapter Note 1, parts or accessories identifiable as suitable for use solely or principally with the instruments of the Chapter are classified with them, and that the instruments and parts of the Chapter may be of any material. The Explanatory Note to heading 39.26 describes that heading as covering articles “not elsewhere specified or included”.

11. Critical observations

A case study should also record what the decision does not settle.

It is fact-specific. The outcome rests on three findings: exclusive design for one analytical system, no shown use with other instruments, and a built-in steel ball that takes part in the measurement. A plain cuvette or sample cup usable on many instruments would not share those facts.
“Part” and “accessory” are not separated. The holding uses “parts/accessories”. Because subheading 9027.90 covers both, the distinction did not affect the result, but the order does not say which the cuvette is.
The threshold question is answered functionally. The Revenue was right that Note 2 applies only to goods that are parts or accessories. The Tribunal answered that by a functional test of necessity to the intended operation, not by physical incorporation. That is the point most likely to be argued again in other cases.
The line between a functional disposable and a supply is left to the facts. The Tribunal accepted that an article merely supplied as material and used up in operation, without being a functional component, may be a consumable and not a part. Reagents are the obvious example.
Limitation and misdeclaration were not decided. Since the classification was upheld, the Tribunal did not rule on whether adding “spare parts for coagulation analyser” to the description justified the extended period.
The order may not be the last word. A Tribunal decision can be carried further in appeal.

12. Practical takeaways

For importers and classifiers handling instrument-specific disposables:

Document the design link. Keep drawings, patents and manufacturer statements showing the article is made for one instrument or one family of instruments.
Document the function. Explain what the article does during the measurement, not only that it “holds the sample”.
Check for other uses. Sole or principal use is the legal test. Evidence that the article fits nothing else is central.
Do not rely on, or fear, the word “disposable”. It describes life-cycle. Ask whether the article is used up or keeps its identity while doing its job.
Describe the goods consistently. Differences between the invoice description and the customs declaration invite a misdeclaration allegation even when the classification is right.
Start with the Notes. Chapter 90 Note 2 gave the answer here; material came into it only as the residuary alternative.

13. Key lessons

Classification begins with the heading terms and the Section and Chapter Notes.
Under Note 2(b) to Chapter 90, a part or accessory suitable for use solely or principally with a particular kind of instrument is classified with that instrument.
The Note asks about suitability for use, not permanent fitting.
“Disposable” is not the same as “consumable”, and neither label decides classification.
An article is considered as a whole; a functional component is not an incidental addition.
A residuary heading based on material is not the answer where a specific provision and a Chapter Note already cover the article.

This article is an educational analysis of a published decision. It is not a binding ruling and is not legal advice. HS texts are quoted from the Harmonized System, 2022 edition, of the World Customs Organization. Codes of six digits are HS subheadings; the eight-digit codes are India’s national tariff items.