What's illuminating the softbox in the background? I assume not just the strobes? Whatever it is, you probably need to reduce its intensity until it's just barely saturating. The brighter the background is, the more light you're going to have coming through the bottle. (Or, conversely, keep the softbox lit as it is, adjust your exposure so that it just barely saturates, and then put additional light on the bottle but not on the softbox until the label looks bright enough.)
If that still leaves you with too much orange glow, consider also painting the back side of the bottle black (as suggested by Johanna M) and/or filling the bottle with some dark liquid such as ink or black fabric dye in water, black paint, molasses, Coca-Cola, etc.
(I assume that, whatever the label says, you don't actually have 65% nitric acid in the bottle. If you do, take it back to where you got it ASAP and get them to supply you with an empty bottle instead. You don't want to handle that stuff without appropriate lab safety equipment and training!)
One more option would be to replace the softbox with a blue background and edit it out of the final image using chroma keying. The reason I specifically suggest blue in this case is that it's the color that will shine the least through the amber glass of the bottle. It also conveniently doesn't appear anywhere on the label or on the bottle itself (although neither does green).
With chroma key, the background doesn't need to be (and indeed shouldn't be) saturated; it just needs enough illumination for the color to be clearly visible. You might even be able to use more or less just the indirect light present in the last image in your question.