We strongly discourage email submissions. (The chances of your submission being read and attended to in due time increase exponentially when you send a submission and SASE via mail. That's just how it is, for some reason.) Send your stuff to h2so4, 10 Railroad Ave 3-A, Haverford, PA 19041, USA.
We have no guidelines. Peruse the site and ask yourself whether you can see your work or project fitting within the "philosophy" of h2so4.
Articles: remember--politics, philosophy, how we live. (Art and love. Arcane and mundane. Make room for more possibility)
Fiction: We very very rarely publish fiction. Philosophical experimentation would better describe the kind of fictional work we are interested in. The shorter, the better.
Poetry: submit 1-5 works at a time.
Reviews: Review anything: music, art, film, text, food, mood, love, lovers, ex-lovers, states of being, passing experiences, observations. Make sure that it is apparent that review-making is not some third-person neutral reporting of "what is," but is all about the writer's world, or how the writer would like the world to be....
In other words, peruse the site and ask yourself whether you can see your work or project fitting within the "philosophy" of h2so4. Send us something.
Contact the editor at firstname.lastname@example.org.