My Jasmine Candle Smells Different After Six Months in a Closed Jar — How Do I Determine Whether the Fragrance Oil or Wax Has Changed?

A closed jar narrows the search

Your jasmine candle has spent six months in a closed jar and now smells different. That detail is useful. A closed lid generally limits how much scent escapes into the room, so the simplest explanation — fragrance drifting off an open surface — is less likely to be the whole story. What remains are changes in the oil, changes in the wax, an interaction between the two, the conditions the jar lived in, and your own perception of a scent you last judged half a year ago.

You cannot separate oil from wax by smelling the finished candle harder, because in the candle they are mixed. You separate them by unmixing the question: make new candles where only one of them is old. That is the cross test described below, and it is the most direct answer to the question you asked.

What the CSI Jasmine page does and does not tell you

CSI's Jasmine page lists a flashpoint of 185°C, 0% vanillin and loads of up to 10% in soy and up to 6% in paraffin. It publishes no shelf life, no storage temperature and no ageing data. Two practical consequences follow.

First, because the page lists 0% vanillin, a jasmine candle that has yellowed or darkened in the jar is not showing the vanillin discolouration that vanilla and coffee pages describe. If your candle has changed colour as well as smell, look harder at the wax, the light the jar was exposed to, and any dye. Second, because no ageing data is published, the only figure you can use for this oil in your candles is the one you measure yourself.

The cross test: old oil, new oil, old wax, new wax

To run it you need four ingredients: oil from the same lot as the six-month candle (a sealed retained sample if you kept one, otherwise the remaining working stock), a fresh sample of the same oil, wax from the same stock or lot as the six-month candle, and a fresh pack of the same wax. Pour 200 g candles at 8% of total candle weight — 184 g wax + 16 g oil — in the same jar and wick.

Here is what the fresh materials cost, as a worked example. A Jasmine 100 g sample is ₹430.00, or ₹4.30 per g; the two new-oil candles use 2 × 16 g = 32 g, so 32 × ₹4.30 = ₹137.60, leaving 68 g to keep as a sealed retained sample. Fresh CSI 464 at ₹507.40 per kg is ₹0.5074 per g; the two new-wax candles and the new-wax control use 184 + 184 + 200 = 568 g, so 568 × ₹0.5074 = ₹288.20. The old oil and old wax are stock you already hold. Cure everything to the stated soy minimum of 48–72 h plus a few extra days, then smell blind.

If you kept no retained oil or wax

Many makers did not keep sealed samples six months ago. You can still run a reduced version. Use whatever remains of the original oil in the working bottle as your “old oil”, accepting that it has been opened and is a harsher test than a sealed sample would be. If none of the original wax lot remains, run only candles B and D plus the controls; you will learn whether the oil moved, and the controls will tell you whether your current wax stock carries an odour. Start keeping retained samples from today so the full grid is available next time.

Reading the cross-test matrix

Have someone code all six new jars and the six-month candle. Smell each against the six-month candle and against the fresh reference, and note which the aged candle most resembles. Score floral top, heart and base separately, and note any odd, sour or waxy background.

Do not forget where the closed jar lived

Closed is not the same as protected. A closed jar on a sunny windowsill, a warm top shelf or near a stove has lived through more heat and light than one in a cool cupboard, and general practice treats heat and light as drivers of ageing for both fragrance and wax. Put a min/max thermometer where the jar sat for a week. If it ran warm, your cross test may show that both materials are sound and the storage was the cause.

Perception still counts after six months. You are comparing a candle with a memory half a year old. The fresh reference D is what replaces that memory; trust the comparison against it more than your recollection of launch day.

Acting on the result

If the oil moved, change how you store and decant oil: sealed, cool, dark, upright, small containers to cut headspace, and a labelled retained sample of every lot. If the wax moved, rotate wax stock oldest first and keep it cool and dry. If neither moved, set a hold time for jasmine candles from your own testing and store finished stock better.

Then buy accordingly. At the 1 kg pack of ₹3,923.00, each candle uses 16 × ₹3.923 = ₹62.77 of oil, and a kilo makes 1000 ÷ 16 = 62 candles (62 × 16 = 992 g). If that is more than six months of jasmine sales for you, a 500 g pack at ₹1,961.00 may suit better until your test shows the oil holds longer.

CSI publishes no shelf life, storage temperature or ageing data for Jasmine. Ask on WhatsApp (+91 7397976926) for storage guidance, the IFRA certificate and MSDS for your lot, and keep the reply in writing. Never promise customers that a jasmine candle will smell the same at month six as at week one.

Where this page fits

CSI already has guides that cover parts of this question. This page answers one fragrance-ageing decision; these cover the neighbouring questions:

Three things to buy for this decision

Frequently asked questions