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Short answer: there is no single shelf life that applies to every bottle of isopropyl alcohol. One manufacturer’s product data sheet for a 99% solvent grade prints 1 year for an unopened, undamaged original container stored between 50 and 85 °F, while a safety data sheet (SDS) for isopropyl alcohol gives storage conditions but no expiry date. For any bottle you hold, the date and conditions printed on its own label, data sheet or certificate of analysis decide the question.
This guide is general product and storage information for lab and clinic staff. It is not medical advice and does not replace the SDS or label supplied with your product.
Definition and scope
Isopropyl alcohol (IPA, 2-propanol) is a volatile, flammable liquid sold as a pure solvent and as diluted solutions such as the 70% grade used for surface disinfection. For what the chemical is and how it is used, see what is isopropyl alcohol. This page covers only how long a stored bottle can be relied on and how it should be kept. Hand sanitizer is a separate case, covered in hand sanitizer expiration.
Does isopropyl alcohol expire? What the documents actually say
Retail articles often quote two to three years for an unopened bottle, but the manufacturer documents cited here do not give a universal figure. Two different document types answer different questions:
- Product data sheet. The Product Data Sheet for PTI “Isopropyl Alcohol 99% Solvent” has a Shelf Life entry: “Shelf life is only applicable for materials stored in unopened and undamaged original factory filled containers. 1 year when stored between 50-85 Fahrenheit.” That is one manufacturer’s figure for one grade, not a rule for all IPA.
- Safety data sheet. The Honeywell Specialty Chemicals SDS for isopropyl alcohol (revision dated 07.09.2018) says “Stable under recommended storage conditions” and lists conditions to avoid, but contains no expiry date. Shelf life is not an SDS item.
Where the shelf-life number comes from: a document checklist
| Document | What it can tell you | What it does not say |
|---|---|---|
| Product data sheet (PTI, 99% solvent grade) | A printed shelf life: 1 year, unopened and undamaged original container, 50-85 °F; flash point 53 °F; listed specifications ASTM D770, TT-I-735A, BS 1595, DIN 53245 | Anything about opened containers or other grades; the sheet itself says to use the latest revision and to refer to the material’s SDS for health, safety, storage and handling |
| Safety data sheet (Honeywell, 2018 revision) | Storage and handling conditions, flash point (12 °C), stability statement | An expiry date or shelf life |
| Your bottle’s own label or certificate of analysis | The date and storage conditions that apply to that lot | Not covered by the two documents above; check your own supplier’s paperwork |
The practical consequence: when a lab or clinic needs a defensible answer, it should cite the supplier’s data sheet or label for that exact product, and treat internet rules of thumb as unverified.
Isopropyl alcohol storage: what the SDS asks for
The Honeywell SDS gives these storage and stability statements:
- “Store in original container.”
- “Keep container tightly closed and in a well-ventilated place.”
- “Keep away from direct sunlight.”
- Conditions to avoid: heat, flames and sparks, and direct sunlight.
- Incompatible with strong oxidizing agents.
For how to segregate oxidizers from flammables on the shelf, see chemical storage compatibility and segregation rules, and for reading these sections of an SDS see how to read a safety data sheet.
Flammable-liquid rules that also shape IPA storage
Storage conditions and fire rules are separate questions. The SDS flash point of 12 °C is below 73.4 °F (23 °C), and the PTI sheet lists a boiling point of 180 °F, above 95 °F (35 °C). Under 29 CFR 1910.106 as published by Cornell Law School’s Legal Information Institute (checked 2026-10-30), a liquid with a flashpoint below 73.4 °F (23 °C) and a boiling point above 95 °F (35 °C) is a Category 2 flammable liquid. By those two figures, pure IPA would fall in Category 2; this is an inference from the data sheets, and the SDS and label for your product govern. The same section states that not more than 60 gallons of Category 1, 2 or 3 flammable liquids may be stored in a storage cabinet. Diluted grades have different flash points, so they must be read from their own SDS. For cabinet design and layout, see flammable liquid storage cabinet requirements.
Opened versus unopened bottles
The PTI shelf life applies only to “unopened and undamaged original factory filled containers.” The cited documents state no shelf life for opened containers, so no figure is given here. An opened bottle falls back on the same documents: the SDS conditions (tightly closed, ventilated, away from sunlight and heat) and whatever your supplier’s label states. For reusing alcohol in a disinfecting role, the concentration on the label matters; see 70% isopropyl alcohol as a disinfectant.
Common misunderstandings
- “The SDS tells me when it expires.” The SDS cited here gives no expiry date; “stable under recommended storage conditions” is a condition, not a date.
- “One year” or “three years” is universal. The one manufacturer figure cited here is 1 year for a 99% solvent grade in its original sealed container at 50-85 °F; it is not generalised to other grades.
- Alcohol swabs and sanitizer follow the same rule. Packaged swabs and hand sanitizer are products with their own labelling; see the hand sanitizer guide linked above and the supplier labelling for swabs.
- Shelf life and fire storage are the same thing. Shelf life is about how long the product is guaranteed to meet its specification; flammable-liquid rules are about quantity and cabinets.
Frequently asked questions
Does isopropyl alcohol expire?
It can carry a printed shelf life. One manufacturer’s data sheet for 99% IPA solvent states 1 year unopened at 50-85 °F; an SDS gives no expiry date. Use the date on your product’s label or data sheet.
How long does isopropyl alcohol last?
No universal duration is stated in the manufacturer documents cited on this page. The PTI sheet’s 1 year applies only to unopened, undamaged original containers of that grade.
How should isopropyl alcohol be stored?
Per the Honeywell SDS: in the original container, tightly closed, in a well-ventilated place, away from direct sunlight, heat, flames, sparks and strong oxidizing agents.
What is isopropyl alcohol expiration based on?
On the supplier’s printed date and storage conditions for that lot. Check the data sheet, label or certificate of analysis rather than a general rule.
Sources
All links checked 2026-10-30.
- PTI, “Isopropyl Alcohol 99% Solvent” Product Data Sheet (PTI-IPA SOLVENT): https://www.aircraftspruce.ca/catalog/pdf/PTI-IPA%20PD.pdf
- Honeywell Specialty Chemicals, Safety Data Sheet “Isopropyl alcohol”, revision date 07.09.2018 (copy hosted by the University of Illinois): https://web.faa.illinois.edu/app/uploads/sites/6/2024/06/IPA-honeywell.pdf
- OSHA, 29 CFR 1910.106, Flammable liquids (text at Cornell LII): https://www.law.cornell.edu/cfr/text/29/1910.106
