Disintegration | EUROLAB

What Is Disintegration?

The disintegration test measures the time for a solid dosage form to break apart, under defined agitation in a defined liquid medium, into pieces small enough to pass through a screen. It differs from dissolution: disintegration measures physical breakup, while dissolution measures the active substance passing into solution.

Purpose of Disintegration

The purpose is to verify the dosage form breaks apart in time in the digestive tract. For enteric-coated products, it shows the form does not break apart in the gastric medium and does break apart in the intestinal medium.

Which Products Is Disintegration Applied To?

Tablets and capsules
Effervescent tablets
Enteric-coated forms
Orally disintegrating tablets
Vaginal and rectal suppositories

In Which Sectors Is Disintegration Used?

PharmaceuticalsBiotechnology

Standards Related to Disintegration

Ph. Eur. 2.9.1 (disintegration of tablets and capsules)
Ph. Eur. 2.9.2 (disintegration of suppositories and pessaries)
USP <701> (disintegration)
Relevant product monographs

Disintegration Conditions

Environment: Liquid defined in the monograph; for enteric products, acidic medium first, then buffer
Temperature: Temperature defined in the standard
Disc use: A disc is used if the monograph specifies it; its use affects the result
Number of units: The number of units defined in the monograph is tested

Equipment for Disintegration

Disintegration tester and basket-rack assembly
Temperature-controlled water bath
Discs
Stopwatch

Sample Requirements for Disintegration

The number of units specified in the monograph
Batch number must be provided
The coating type must be stated for enteric-coated products
The specimen must be sent in its original packaging

Duration of Disintegration

The test takes minutes for fast-disintegrating products. Duration extends for enteric-coated products due to the acidic stage followed by the buffer stage.

Disintegration Procedure

1The apparatus and water bath are brought to the defined temperature.
2The medium is prepared.
3Units are placed in the basket tubes; a disc is added if the monograph requires it.
4The apparatus is started and agitation begins.
5The time for each unit to fully disintegrate is recorded.
6For enteric products, the buffer stage follows the acidic stage.

Disintegration Acceptance Criteria

The acceptance criterion is not given on this page: for every active substance and every product, the limit comes from the relevant pharmacopoeia monograph or the approved specification in the marketing authorisation dossier. The pharmacopoeia's general chapter defines the method; the monograph sets the limit.

Evaluation of Results

Disc use markedly changes the result; whatever the monograph specifies is applied. For enteric-coated products, any breaking or cracking during the acidic stage is a direct non-conformity — no time criterion is applied.

Disintegration Report

Product identification and batch information
Monograph and medium applied
Temperature and disc use
Disintegration time for each unit
Acidic-stage observations for enteric products

Accreditation

EUROLAB holds internationally recognised accreditation obtained from accreditation bodies party to the IAF and ILAC multilateral recognition arrangements, under ISO/IEC 17025 for laboratory testing, ISO/IEC 17020 for inspection and surveillance, and ISO/IEC 17021-1 and ISO/IEC 17065 for system and product certification. This chain ensures the reports and certificates issued are accepted worldwide.

Whether this test can be offered within accredited scope depends on your product and the standard applied; since accreditation is method-based, the scope is confirmed in writing at the quotation stage.

Scope and authorisations

Related Regulations

2001/83/EC Directive on Medicinal Products for Human Use
GMP Guide (EudraLex Volume 4)

Pharmaceutical Analysis — What Does This Testing Field Cover?

The section below describes the field that the Disintegration test belongs to; the conditions and acceptance criteria of this particular test are given in the sections above. The scope specific to your product is confirmed in writing at the quotation stage.

Pharmaceutical analysis determines the identity, purity, quantity and behaviour of an active substance and of the finished product. What sets this family apart is that the methods are largely defined in PHARMACOPOEIAS: the European Pharmacopoeia (Ph. Eur.) and the United States Pharmacopeia (USP) give both the method and the acceptance framework together.

The binding nature of the pharmacopoeial method shapes how the field works. In other sectors a laboratory can choose a suitable method, whereas here the method in the monograph governs; if an alternative method is to be used, its equivalence must be demonstrated. This is what makes results comparable worldwide.

Analyses are carried out in several groups. Identity and assay (HPLC, UV, titration) show what the product is and how much active substance it contains. The impurity profile and residual solvents look for unwanted compounds arising from the manufacturing process. Elemental impurities address metals originating from catalysts and equipment. Dissolution and disintegration behaviour is the most important in vitro indicator of how the drug will be released in the body.

The DISSOLUTION TEST is one of the most critical measurements in the field. It is not enough for a tablet to contain the right amount of active substance; that substance must dissolve at a suitable rate. The dissolution profile is used to assess the effect of formulation changes on bioavailability and holds a central place in generic drug licensing.

METHOD VALIDATION is a mandatory step in this family. If a pharmacopoeial method is used, it is verified that the method works properly under that laboratory's conditions. If an in-house method has been developed, it is validated against parameters such as linearity, precision, accuracy, specificity, limits of detection and quantification, and robustness. A result produced with an unvalidated method cannot be used in a licence dossier.

Stability studies determine shelf life and are the longest-running work in the field. The product is held under defined temperature and humidity conditions, analysed at set intervals, and the results become the basis of the shelf life and storage condition claims. Accelerated conditions give preliminary information but real-time data is what counts.

The microbiological side is a separate body of work: microbial enumeration, testing for specified microorganisms, sterility testing for sterile products and the bacterial endotoxin test. For sterile products, packaging integrity and sterilisation validation also come into play.

Data integrity has moved to the centre of inspections in recent years. It is not enough for the result to be correct; the raw data must be traceable, unalterable and auditable. Validation of electronic record systems has therefore become an inseparable part of analysis.

Method groups in this field

Identity and assay
HPLC, UPLC, UV-Vis spectrophotometry, titration, identity confirmation by FTIR.
Impurities and residues
Related impurities, degradation products, residual solvents (GC headspace), nitrosamine screening.
Elemental impurities
Determination of elemental impurities by ICP-MS and ICP-OES and the associated risk assessment.
Physicochemical
Dissolution and disintegration, hardness, friability, uniformity of dosage units, water content (Karl Fischer), particle size.
Microbiological
Microbial enumeration, specified microorganisms, sterility, bacterial endotoxin, preservative efficacy.
Stability
Real-time and accelerated stability studies; photostability and in-use stability.

Commonly confused in this field

The pharmacopoeial method is binding; an alternative method may be used only by demonstrating its equivalence.
A result produced without method validation cannot be used in a licence dossier.
Accelerated stability does not replace real-time data; shelf life is supported by real-time results.
The dissolution profile is sensitive to apparatus type, agitation rate and medium; the conditions must be complete in the report.
A shortcoming in data integrity produces a non-conformity in an inspection even when the result is correct.
A change of formulation or supplier requires analytical comparison and, where necessary, a new stability study.

Which decisions these results support

The licence dossier and batch release
Determining shelf life and storage conditions
Method transfer and method validation
Incoming raw material acceptance control from suppliers
Assessing the effect of a formulation change on bioequivalence

Related Tests

Frequently Asked Questions About Disintegration

Does disintegration testing replace dissolution testing?

Generally not; whichever the monograph requires is applied. For some products, dissolution testing is mandatory and disintegration testing alone is not considered sufficient.