The problem is here not so much the storage of the materials (glass is readily available, if somewhat delicate) but their use as flamethrowers. The fuels are very dangerous to handle, and in two of the three cases, exceedingly toxic. You've also got a lot of gas-phase ingredients, which limits the range of your weapon (think "large flame" rather than "giant spray of burning liquid falling on your enemies") and as they will be low density you'll either have real problems carrying enough with you, or you'll have to produce them in quantity in situ and producing large quantities of reasonably pure and highly toxic gas with primitive chemical and processes and pre-industrial equipment sounds like a disaster waiting to happen, and not for your enemies.

You won't be able to spray this stuff out of hand siphons... the operators will probably just kill themselves. Out of larger devices... well, maybe. The descriptions of the ship-mounted greek fire siphons used by the Byzantines sound like they might be adaptable to your needs, but the chances of poisoning yourself whilst operating it is extremely high. Spraying around concentrated acid also sounds like a recipe for disaster... I'm not sure how practical it is to plate your ship in lead, but you'll end up with plenty of acid spray which is bad news for everyone.

All of your suggestions seem inferior to greek fire. They might be redeemable if you can use solid or liquid-phase ingredients in bombs and grenades rather than playing with flamethrowers, but the aside from the acid option the other two recipes are probably too toxic to use on any battlefield where you value your own troops, or the land your fighting on or near.

Phosphine is a gas at the sort of temperatures you'll be able to create, and it is hideously toxic to boot. Pumping it without exposing it to oxygen sounds like a tricky job but not impossible. The problem is that when you squirt it out it'll produce a big frightening jet of fire but in the absense of a sticky liquid fuel that will continue to burn afterwards it won't be a particularly effective flamethrower. The fumes are corrosive and irritating which is risky to both the target and the shooter of the fire.

The problem here is not so much the storage of the materials (glass is readily available, if somewhat delicate) but their use as flamethrowers. The fuels are very dangerous to handle and, in two of the three cases, exceedingly toxic. You've also got a lot of gas-phase ingredients, which limits the range of your weapon (think "large flame" rather than "giant spray of burning liquid falling on your enemies") and as they will be low density you'll either have real problems carrying enough with you, or you'll have to produce them in quantity in situ and producing large quantities of reasonably pure and highly toxic gas with primitive chemical processes and pre-industrial equipment sounds like a disaster waiting to happen, and not for your enemies.

You won't be able to spray this stuff out of hand siphons... the operators will probably just kill themselves. Out of larger devices... well, maybe. The descriptions of the ship-mounted Greek fire siphons used by the Byzantines sound like they might be adaptable to your needs, but the chances of poisoning yourself whilst operating it is extremely high. Spraying around concentrated acid also sounds like a recipe for disaster... I'm not sure how practical it is to plate your ship in lead, but you'll end up with plenty of acid spray which is bad news for everyone.

All of your suggestions seem inferior to Greek fire. They might be redeemable if you can use solid or liquid-phase ingredients in bombs and grenades rather than playing with flamethrowers, but the aside from the acid option the other two recipes are probably too toxic to use on any battlefield where you value your own troops, or the land you're fighting on or near.

Phosphine is a gas at the sort of temperatures you'll be able to create, and it is hideously toxic to boot. Pumping it without exposing it to oxygen sounds like a tricky job but not impossible. The problem is that when you squirt it out it'll produce a big frightening jet of fire but in the absence of a sticky liquid fuel that will continue to burn afterwards it won't be a particularly effective flamethrower. The fumes are corrosive and irritating which is risky to both the target and the shooter of the fire.