Also, yeah i can get your point @
Greenfield ,would seem a bit OP or abusive which is something my DM also said..id personally like to earn it thru any means..gonna depend on my DM but...i'm mostly thinking/wanting something that will burn my opp's eyes..like said pepper spray...only it being some substance that won't be harmful when applied to me mouth so i can spray it in a mist form, which i can now do in RL heehee
..
What you're asking for there isn't exactly in the rules. So what I'd do is not worry about
poison per se, and look for the game mechanic that will get you the result you want. After that's done, the details are game color, maybe something that will get you a circumstance bonus, but largely there for flavor.
To that end I'd look at the
Feint maneuver, and perhaps the
Improved Feint feat. What this does is allow you to distract your opponent for a moment via a
Bluff check, granting you an opportunity to make a sneak attack.
SRD said:
...Feinting in Combat: You can also use Bluff to mislead an opponent in melee combat (so that it can’t dodge your next attack effectively). To feint, make a Bluff check opposed by your target’s Sense Motive check, but in this case, the target may add its base attack bonus to the roll along with any other applicable modifiers. If your Bluff check result exceeds this special Sense Motive check result, your target is denied its Dexterity bonus to AC (if any) for the next melee attack you make against it. This attack must be made on or before your next turn. Feinting in this way against a nonhumanoid is difficult because it’s harder to read a strange creature’s body language; you take a –4 penalty on your Bluff check. Against a creature of animal Intelligence (1 or 2) it’s even harder; you take a –8 penalty. Against a nonintelligent creature, it’s impossible.
Feinting in combat does not provoke an attack of opportunity.
When an opponent is "denied its Dexterity bonus to AC", a Rogue type gets to add their extra dice of damage, as if striking with surprise, or from a flank.
Note that, without the Improved Feint feat, using Bluff this way is a Standard Action, meaning that you have to Feint this round, and attack next round.
SRD said:
IMPROVED FEINT [GENERAL]
Prerequisites: Int 13, Combat Expertise.
Benefit: You can make a Bluff check to feint in combat as a move action.
Normal: Feinting in combat is a standard action.
A fighter may select Improved Feint as one of his fighter bonus feats
There are also some Prestige Classes that get to Feint as a Free Action, which gets insane.
As for the idea of something you can spit in a man's face to blind him, but which won't poison or burn you: Wine? Vinegar? Salt water? Brandy? Beer?
Note that, IRL, distilled spirits sprayed this way are flamable. Think of the classic circus trick of spitting fire.
Also note that fighting while essentially holding your breath, waiting for the right moment to spray in their face, is kind of insane. Doesn't work in real life, which is kind of what you're trying to apply in this game situation.
.. im sure to surprise my DM on how ive improved..unless he fudges up my progress lol..but thanks a lot!
And...i wouden't hold my breath that much because, i would be holding it in a sort of ''pill'' so that i can take it anytime, chew it and let out the substance..if it don't provoke an AoO..ill talk to him about it..so that when im pinned or..haveno way out from someone, PHEWW lol 
..but i do have weapon finesse, i was gonna pick Dodge has my 3rd lvl feat...should i or no?? What im interested in Chink in armor for those heavy plated fools... like the idea of being able to dodge, doing so what a rogue does ><
