A TDS describes the product as the plant normally makes it. It does not describe the material in your container, and it was never designed to.
A Technical Data Sheet — TDS, sometimes labelled product data sheet or PDS — is the document a producer publishes to describe a grade as it is normally manufactured. For bitumen it comes from the refinery or blending plant, it carries a revision number and an issue date, and it applies to every tonne of that grade the plant produces. It does not apply to any particular tonne, and that distinction is the whole subject of this page.
A good bitumen TDS is a short, dense engineering document: identification and the governing standard, one table of properties with the test method beside every line, a statement of intended applications, the temperatures at which the product can be handled safely, the packing it is offered in, a summary pointing to the Safety Data Sheet, and a disclaimer. Nothing on it is cargo-specific and nothing on it is negotiable. It is the seller stating, in advance and in public, what the product is.
The TDS is the only document in the export set that exists before there is a transaction. A Certificate of Analysis cannot be issued until a batch has been produced and sampled. A certificate of origin cannot be issued until there are goods to certify. An inspection certificate needs a cargo to inspect. The data sheet is available on day one of an enquiry, which makes it the natural basis for the technical conversation: compare it against your project specification, identify the lines that do not match, and settle those before anyone discusses price.
A TDS is written by the seller. It is not a certification, it is not audited, and no independent party signs it. Its authority comes from the standard it cites — ASTM D946 for penetration-graded paving bitumen, ASTM D3381 for viscosity grades, EN 12591 in Europe, IS 73:2013 in India, AASHTO M320 or ASTM D6373 for performance grades, ASTM D312 for oxidized roofing grades, ASTM D2027 and ASTM D2028 for medium- and rapid-curing cutbacks, ASTM D977 and ASTM D2397 for anionic and cationic emulsions. A data sheet that names no standard at all describes a product nobody can check, and that is a commercial problem before it is a technical one.
They answer three different questions and no one of them stands in for another. The most expensive version of this confusion is a buyer who accepts a data sheet in place of a Certificate of Analysis and discovers at discharge that nobody ever measured the material that was loaded.
Five documents travel with a bitumen shipment for five different reasons. Confusing them is the most common cause of a buyer holding paperwork that does not answer the question being asked.
| Document | What it proves | Who issues it | When it matters in the transaction |
|---|---|---|---|
| Technical Data Sheet (TDS) | The specification, typical properties and safe handling limits of the grade as normally produced | The producer's technical department; revision-controlled | Enquiry and contract drafting — it becomes the annexed specification you are buying to |
| Certificate of Analysis (COA) | The measured results for the specific batch or tank loaded, set against the contract specification | The producer's quality control laboratory, or an independent laboratory | At loading and at document presentation — it is the evidence that the cargo conforms |
| Safety Data Sheet (SDS / MSDS) | Hazard classification, exposure controls, first aid, firefighting media and transport classification (UN 3257 covers bulk carriage at elevated temperature) | The producer or supplier, in the 16-section GHS format | Before transport is booked, at terminal acceptance, at destination customs and in the site HSE file |
| Certificate of Origin | The country in which the goods were produced | A chamber of commerce in the exporting country, sometimes with consular legalisation | Customs clearance and preferential duty treatment; commonly a required document under a letter of credit |
| Third-party inspection certificate | Independently witnessed quality, quantity and packing condition at the load port | An international inspection company such as SGS, Intertek or Bureau Veritas | At loading — the neutral record if quality or quantity is disputed afterwards |
Producers format data sheets differently, but a complete one carries these eight sections. A sheet missing three of them is a marketing leaflet with a specification table pasted into it.
Trade name, grade designation, product family and the standard it is produced to — for example ASTM D946 or IS 73:2013 — usually with HS code 2713.20 and CAS number 8052-42-4. This section serves your customs broker as much as your engineer.
The core table. Each line should give the property, the unit, the limit or typical value and the test method: ASTM D5, EN 1426 or IS 1203 for penetration, ASTM D36 for softening point, and so on down the sheet.
A scope statement — hot mix asphalt, surface dressing, roofing, pipe coating, or feedstock for cutback and emulsion production. It describes intended use, not suitability for your project, which remains your engineer's decision.
Storage, pumping and mixing ranges, a maximum heating temperature and the flash point they derive from. This is the section your tank farm, your insurer and your asphalt plant operator will actually read.
Drum weights, jumbo and poly bag sizes, bitutainer and bulk. A good sheet states net weight per unit and whether drums are new; per-container loading counts usually belong to the commercial offer rather than the data sheet.
A short passage on hot-product burn hazard, fume and hydrogen sulphide exposure and required PPE, ending in a pointer to the full Safety Data Sheet. It is a summary and never a substitute for the SDS.
The clause stating that values are typical, that no warranty is given and that the buyer must verify suitability for the intended use. Read it — it defines what the rest of the sheet legally is.
Document control. A data sheet can be revised without notice, so the revision you priced from and the revision annexed to the contract must be the same one, identified by number and date.
Most misreadings of a bitumen data sheet come down to one word: typical.
Bitumen data sheets present properties in one of three styles, and they do not mean the same thing.
Every property line should name the test method that produced it. Penetration at 25 °C is ASTM D5, EN 1426 or IS 1203. Softening point by ring and ball is ASTM D36, EN 1427 or IS 1205. Flash point by Cleveland open cup is ASTM D92, solubility in trichloroethylene is ASTM D2042, specific gravity is ASTM D70, and ageing is ASTM D1754 for the thin film oven test or ASTM D2872 for the rolling thin film oven test. Where the method is missing the line cannot be enforced — a viscosity figure with no method could be absolute viscosity at 60 °C in poise, kinematic viscosity at 135 °C in centistokes, or rotational viscosity in pascal-seconds, and those three numbers are not convertible into one another.
Penetration in dmm, meaning tenths of a millimetre. Softening point and flash point in °C. Ductility in cm. Solubility and mass change in weight per cent. Absolute viscosity in poise, kinematic viscosity in centistokes, rotational viscosity in pascal-seconds. DSR parameters in kilopascals and BBR creep stiffness in megapascals. A sheet that mixes systems without labelling its units is worth querying before it is worth trusting.
These two documents are frequently treated as different levels of detail on the same subject. They are not. One is a description of a product family, the other is a measurement of a shipment.
| Question the buyer is asking | Technical Data Sheet | Certificate of Analysis |
|---|---|---|
| What does it describe? | The grade as normally manufactured | One identified batch, tank or production lot |
| Where do the numbers come from? | Specification limits, or averages over recent production | Laboratory results measured on a sample of that batch |
| Is it traceable to my cargo? | No — there is nothing for it to be traced to | Yes — batch or tank number, sampling date and test date |
| When can it be issued? | At any time; it exists before your enquiry | Only after the batch has been produced and sampled |
| Who signs it? | The producer's technical department | The producer's QC laboratory, or an independent laboratory |
| Does it change? | Yes, by revision, without notice to earlier buyers | No — it is a one-off record of one cargo |
| What is its role in the contract? | It becomes the annexed specification you are buying to | It is the evidence that the specification was met |
| Is it required under a letter of credit? | Rarely | Frequently, sometimes with a third-party countersignature |
| What does it prove in a dispute? | What was promised | What was delivered |
This is the part of the data sheet that gets used every day once the cargo arrives. A sheet that gives a specification table and then two vague lines on heating has left out the half your operations team needs.
| Entry the section should carry | What a complete paving-grade sheet states | What its absence costs you |
|---|---|---|
| Storage temperature, short term | 150–165 °C for penetration and viscosity grades | No agreed ceiling for the tank farm, and oxidative hardening argued about after the fact |
| Storage temperature, long term | Below 150 °C, with a stated maximum holding period | The binder ages in the tank and no longer matches the penetration on the COA |
| Pumping and circulation | 130–160 °C | Pumps cavitate at the cold end of the range and the plant loses a shift |
| Maximum heating temperature | A hard ceiling around 180–190 °C, well below the flash point | No documented limit to point to when a tank or a kettle is overheated |
| The flash point the limits derive from | The stated minimum by Cleveland open cup, ASTM D92 — 232 °C is the ASTM D946 floor and 230 °C the EN 12591 floor, though most export sheets print minimum 250 °C | Your insurer and the receiving terminal have to request it separately |
| Heating method | Gradual and uniform heat, coils kept fully covered by product, no direct flame against a dry drum wall | Carbonised binder on a hot surface, a ruined batch and a genuine fire risk |
| Storage of packed product | Drums and bags under cover, off the ground and away from standing water | Water ingress, drum corrosion and violent foaming when the drums are later melted |
| Product-specific cautions | Emulsions typically held between about 10 and 85 °C and protected from freezing; cutbacks handled far cooler, with the ceiling tied to a Tag open cup flash point, ASTM D3143 | The most common way a product is destroyed before it ever reaches the road |
A TDS becomes commercially binding only when the contract says so, and only in the version the contract names.
The most common mistake in a bitumen sales contract is the phrase quality as per seller's technical data sheet, left standing on its own. It fails in three ways at once. It does not say which revision, and revisions change. It does not convert typical values into limits, so a typical penetration of 65 dmm becomes an aspiration rather than an obligation. And it does not say how conformity will be established or by whom, which is precisely the clause that gets used when something goes wrong.
The quality clause of a bitumen contract usually needs four elements in this order: the grade and its governing standard; the property table expressed as limits with test methods, either in the clause or in a named annex; a statement that conformity is evidenced by a Certificate of Analysis issued for the loaded batch showing batch or tank number and sampling date; and the inspection arrangement, naming the inspection company, the scope of inspection and who bears the cost. Packing, Incoterm, payment and timing belong in their own clauses and should not be folded into this one.
A technical data sheet describes typical product. It cannot describe the material in your container, because it was written before that material existed. It carries no batch number, no sampling date and no measured result, so there is nothing in it that can be checked against a cargo. This is not a weakness in one supplier's sheet — it is what the document is. The consequence is fixed and it is worth stating plainly: a TDS can never substitute for a Certificate of Analysis. A shipment covered only by a data sheet is a shipment nobody has tested. Where a letter of credit calls for a certificate of analysis, no quantity of data sheets will satisfy the bank, and where an engineer at destination asks what the binder actually measured, the data sheet has no answer to give.
The annexed document stays useful right through execution. It is what the tank farm sets its heating controls from, what the asphalt plant reads before the first batch, what the freight forwarder consults on packing and net weights, and what you hold the Certificate of Analysis against when it arrives. Keep it in the shipment file with the rest of the set rather than leaving it in the enquiry folder.
Five steps. They cost nothing and they remove most of what goes wrong later.
Request the data sheet by grade and check three things on receipt: the revision number, the issue date and the standard it cites. If the sheet is undated or names no standard, resolve that before discussing quantity or price.
Mark every property your project requires that the sheet does not carry, and every line where the sheet is wider than your specification. Those are the points to settle, and settling them before price is far cheaper than settling them after loading.
Annex the identified revision, convert typical values into minima and maxima, name the test method against each line, and state whose test result governs if the two laboratories disagree.
The Certificate of Analysis must show a batch or tank number, a sampling date and measured results. On a first shipment, an independent inspector at load port with sealed retained samples held by both parties is the cheapest protection available in this trade.
TDS revision, COA, SDS, certificate of origin, inspection certificate, packing list and bill of lading, filed as one set. Customs, your insurer and any later claim all draw from the same file, and an incomplete file is discovered at the worst possible moment.
It is the document a producer issues to describe a bitumen grade as it is normally manufactured: identification and governing standard, a table of properties with the test method beside each line, applications, handling and storage temperatures, packing options, a safety summary and a disclaimer. It carries a revision number and an issue date, and it applies to all production of that grade rather than to any particular cargo.
A TDS states what the grade is in general; a Certificate of Analysis states what one identified batch measured. The data sheet exists before your order and has no batch number. The COA is issued after production and sampling and carries a batch or tank number, a sampling date and actual results. The TDS is the promise, the COA is the evidence.
Only if the contract annexes a specific revision by number and date, converts the typical values into contractual limits, and names the test method for each line. The phrase quality as per seller's technical data sheet, standing alone, is close to unenforceable, because the sheet can be revised without notice and typical values are not commitments.
No. A Safety Data Sheet covers the material as a hazard — classification, exposure controls, first aid, firefighting media, spill response and transport classification — in a fixed 16-section format, and says nothing about whether the product meets your specification. A TDS covers the specification and devotes only a few lines to safety. Terminals, transport operators and many customs authorities want the SDS; your engineer wants the TDS.
No. Typical values describe recent average production. What must be met is the specification limit for the grade as written into your contract. If a sheet shows a typical penetration of 65 dmm for a 60/70 grade, a batch measuring 62 or 69 dmm is fully compliant. This is the single most common source of avoidable disputes in the trade.
Because the two documents measure different things. The COA reports what one batch actually measured; the data sheet reports limits or averages. Variation inside the specification range is normal and expected. Variation outside the range is a conformity issue, and it needs to be raised before the cargo loads rather than after it arrives.
No. Origin is proven by the certificate of origin issued by a chamber of commerce in the exporting country, and the identity of the material actually loaded is established by the Certificate of Analysis and, where used, the third-party inspection certificate. A data sheet is a description of a product, not a record of a shipment.
Four things, in this order. First, the standard it is produced to and whether that matches your project specification. Second, whether a test method is named against every property line. Third, whether the ageing and solubility lines are present at all. Fourth, the revision number and issue date. If those four are in order, the rest of the sheet is usually sound.
Send the grade, quantity, packing and destination port on WhatsApp and the current technical data sheet for that grade will be sent with the offer, with its revision number and issue date. If you have a project specification, attach it and the sheet will be checked against it line by line before pricing.