Cross-Cutting Engineering

Flammability and Ignition

Classify aerosol and spray ignition behavior by measuring flame projection and ignition distance under defined test conditions.

We run 16 CFR 1500.45 and ASTM D3065-style tests to support hazard classification, packaging, and labeling decisions.

ISO 1702516 CFR 1500.45ASTM D3065DOT 49 CFRReviewed 2026-05-16
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Purpose & when to use

Flammability and ignition testing examines how aerosols, sprays, liquids, and packaged products behave when exposed to defined ignition sources. Depending on the product and classification question, ARE Labs uses flame-extension fixtures, ignition-distance jigs, hot-surface rigs, or closed-cup flash point apparatus. Programs align with ASTM D3065 aerosol methods, closed-cup flash point practice, and DOT transport frameworks under ISO 17025 quality controls. Use this service when ignition behavior affects classification, product design, labeling, or shipping evidence:

  1. ASTM D3065 aerosol classification for consumer sprays using flame-extension fixtures to document ignition distance and flame projection.
  2. DOT transport planning for pressurized aerosols using ignition-distance results and package state records to support shipping narratives.
  3. DOT flash point screening for liquid concentrates or refills using closed-cup apparatus before aerosol package selection.
  4. DOT 49 CFR-adjacent hazard review for fire-suppression products using hot-surface rigs and documented ignition observations.
  5. DOT storage discussions for industrial aerosols using formulation comparisons, propellant screens, and replicate flame behavior records.

Use flammability and ignition testing when a product's spray, liquid, propellant, or package format could affect its hazard class or handling language. Before samples enter the controlled test area, the method plan defines the fixture, conditioning, replicate count, and reporting framework.

Built for aerosol, spray, and transport products

Ignition studies serve consumer, industrial, and transport-facing product teams where ASTM, DOT, UN, or NFPA frames shape safety classification, labeling, or design choices.

  • Consumer aerosolsAir care and personal sprays
  • Pressurized spraysPropellant-driven aerosol packages
  • Pump spraysTrigger and fine-mist formats
  • Industrial aerosolsMaintenance and process sprays
  • Transport productsPackages needing hazard context

Instrumentation & measurement ranges

ARE Labs selects the fixture based on the product format, ignition question, and regulatory framework. Geometry and replicate requirements are then fixed in the protocol.

0 - 100 cmdistance

Flame extension and ignition-distance jigs

Defined spray geometry with measured ignition source position, actuation distance, and observed flame projection for aerosol and spray classification studies.

25 - 600 Csurface

Hot-surface ignition rigs

Fit-for-purpose heated surfaces used when product contact with hot equipment, battery assemblies, or fire-suppression hardware is the ignition question.

0 - 100 Cflash-point

Closed-cup flash point apparatus

Liquid concentrate or refill screening using closed-cup flash point conditions when solvent volatility informs hazard classification context.

15 - 35 Cenvironment

Conditioning and observation controls

Temperature, equilibration, airflow, can state, shot validity, and optional video records documented with each replicate sequence.

Test method options

MethodStrengthsTradeoffAligned with
Regulatory aerosol flammability classification
  • Directly supports 16 CFR consumer aerosol classification and label evidence.
  • Defined fixture geometry makes ignition distance and flame projection traceable.
Can state, spray distance, and ignition source control drive validity.
16 CFR 1500.45
ASTM spray ignition characterization
  • ASTM D3065 framing supports formulation, propellant, and nozzle comparisons.
  • Replicate flame behavior records show sensitivity to spray pattern changes.
Fit depends on product format and spray plume stability.
ASTM D3065
Closed-cup flash point screening
  • Closed-cup results add liquid volatility context before package selection.
  • Useful for concentrates, refills, solvents, and formulation change screens.
Flash point alone does not classify aerosol flame projection.
ASTM D56
Transport and packaging context evaluation
  • DOT frames connect ignition observations to shipping discussions.
  • Package state, fill level, and conditioning records support review narratives.
Interpretation needs product, package, and transport lane details.
DOT 49 CFR
Worst-case condition mapping
  • NFPA 30 context helps bracket storage and handling questions.
  • Temperature, fill level, and nozzle changes identify ignition sensitivity.
More conditions increase run count and sample demand.
NFPA 30

Setup configurations

A flammability study begins with a protocol that defines product conditioning, fixture geometry, ignition source, actuation method, replicate count, valid-shot criteria, and safety controls. During testing, each observation is tied to the sample state, environmental conditions, and measurement geometry for that run. Together, these records allow classification and comparison results to be interpreted without reconstructing the test afterward.

Device interfaces

Can, pump, nozzle, valve, actuator, package orientation, and sample state documented before each condition.

Flow & actuation profiles

Spray distance, angle, actuation duration, ignition source position, and shot timing fixed in the protocol.

Environmental controls

Temperature, equilibration time, airflow limits, and test area controls logged where method intent requires them.

Sample numbers

Replicates per condition and valid-shot rules set before testing to support classification or comparison decisions.

Chain of custody

Sample identity, lot, package condition, conditioning history, and final disposition recorded through reporting.

Quality anchors for ignition evidence

The quality basis and method framework should be clear before flammability test setup begins. These four anchors establish how ARE Labs documents fixture conditions, sample conditioning, test observations, and transport documentation.

  • ISO 17025AccreditedTesting-laboratory competence, traceability, and controlled records.
  • 16 CFR 1500.45AlignedAerosol flammability classification frame for consumer products.
  • ASTM D3065AlignedFlame projection and ignition-distance aerosol method anchor.
  • DOT 49 CFRAlignedTransport-facing documentation and dangerous-goods context.

Key data outputs & reporting

Each flammability and ignition study provides classification-focused results and the setup records needed to interpret them. The report identifies the method framework, sample identity, conditioning, fixture geometry, ignition source, replicate plan, and valid-shot criteria. It also documents measured distances, observed ignition behavior, flash point results when applicable, and any transport or storage context relevant to the study decision and evidence package.

Primary outputs

  • Ignition distance, flame projection, and observed flame behavior by sample, condition, and replicate.
  • Flash point values for applicable liquids, concentrates, or refills with method and condition notes.
  • Classification or screening summary tied to the selected 16 CFR, ASTM, DOT, UN, or NFPA frame.
  • Condition comparisons for formulation, propellant, nozzle, temperature, fill level, or package changes.

Deliverables

#FormatContents
01PDF reportMethod frame, setup geometry, replicate results, observations, and classification discussion.
02CSV / XLSX datasetsReplicate distances, outcomes, condition metadata, and flash point values where applicable.
03Images / videosOptional still frames or video records for technical review and traceability.

QA / QC & data integrity

Ignition data depend on careful control of the test setup. QA / QC records cover fixture geometry, ignition source condition, product conditioning, environmental logs, replicate acceptance, and safety checks before the results are interpreted. The final report links each observation to the sample identity and run conditions so classification and comparison decisions remain auditable.

Fixture geometry checks and ignition source verification before the test set.

Conditioning logs for temperature, equilibration time, package state, and airflow where applicable.

Replicate runs with valid-shot criteria and documented exclusions before summary calculations.

Sample identity, batch or lot tracking, receipt condition, and chain-of-custody records.

Controlled test area documentation, safety checklists, and optional video traceability.

Why ARE Labs

ARE Labs connects technical topics to practical study design, method selection, controlled aerosol work, and reportable evidence without turning technical pages into sales pages.

Reviewed byJamie Balarashti (25 yrs - cascade & inhalation methods) - Weston Schaper (7 yrs - real-time sizing & nanoparticle work)
17025Accredited testing
900+Studies Performed
17+Years in operation
300+Clients supported

Common questions

Flammability questions often come from product safety, regulatory, packaging, transport, or formulation teams that need classification evidence for an aerosol, spray, liquid, or packaged product. The answers below address aerosol flame testing, flash point context, transport documentation, temperature bracketing, and typical deliverables. Contact ARE Labs if the product format, hazard framework, available sample, or jurisdiction calls for a different test setup.

Q.Is this required for every aerosol product?
A.Many aerosol products need flammability classification for labeling or transport, but the specific requirements depend on the product type and jurisdiction. We define the method framework before testing so the report addresses the intended decision.
Q.Can you compare two propellants or formulations?
A.Yes. Comparative studies can measure ignition distance, flame projection, and observed behavior across formulations, propellants, nozzles, temperatures, or fill states while holding the fixture and replicate plan constant.
Q.When does flash point testing belong in the program?
A.Flash point testing is useful when liquids, concentrates, refills, or solvents affect the hazard context. It does not replace aerosol flame projection testing when classification depends on the behavior of the packaged spray.
Q.Can you test at different temperatures?
A.Yes, when temperature conditioning is fit for the study purpose. It can bracket temperature-sensitive spray behavior, pressure state, or worst-case handling conditions, with equilibration details and environmental records included in the report.
Q.What do I receive after testing?
A.Deliverables typically include a PDF report, replicate tables, setup geometry, conditioning records, measured distances, and ignition observations. Still frames or video can also be provided for internal technical review.

Standards & guidance

Flammability and ignition programs are scoped around the product format, classification question, and transport or storage framework. ARE Labs uses ISO 17025 as the quality-system anchor and aligns the work with 16 CFR, ASTM, DOT, UN, and NFPA references where applicable. The cards below identify the standards commonly used for aerosol ignition, flash point, package context, and safety documentation.

QA & Regulatory - Accredited

ISO 17025

Testing-laboratory competence, traceable records, calibration control, and uncertainty contributorsView standard ->Flammability & Product Safety - Aligned

16 CFR 1500.45

Aerosol flammability classification method for consumer products under FHSA framingView standard ->Flammability & Product Safety - Aligned

ASTM D3065

Aerosol flame projection and ignition-distance method for comparative spray studiesView standard ->Flammability & Product Safety - Aligned

ASTM D56

Closed-cup flash point method for liquid volatility and hazard contextView standard ->Transport & Packaging - Aligned

DOT 49 CFR

Transport-facing dangerous-goods and packaging documentation contextView standard ->Flammability & Product Safety - Aligned

NFPA 30

Storage and handling context for flammable and combustible liquid materialsView standard ->

Related services & devices

Service

Stability and Accelerated Aging

Pairs with ignition studies when storage, temperature, or package aging may change spray behavior or hazard classification.Read more ->Devices

Spray & Aerosol

Consumer and industrial sprays often need ignition-distance, flame projection, and packaging evidence before launch or change control.Read more ->Service

Spray Pattern and Plume Geometry Testing

Plume and pattern data help explain ignition differences caused by nozzle, actuator, formulation, or propellant changes.Read more ->Devices

Air Treatment

Fire-suppression, diffuser, and treatment products may need ignition context alongside emissions or performance testing.Read more ->