Primal Air

Primal Air is to elemental air what elemental air is to the stuff you breathe. It is used in a wide range of high-end recipes.

Source
The primary source for Primal Air is by combining 10 motes of air into one Primal Air. Motes of Air are mainly found by dissecting high level Air Elementals, most commonly those in Nagrand.

Primal Air can also be created through Alchemy with the Transmute: Primal Water to Air recipe.

Common locations for Air Elementals with high mote drop rates are the Elemental Plateau and certain areas in Shadowmoon Valley

Primal Air as an Ingredient
Primal Air is used in the following recipes:

Alchemy

 * by Transmute: Primal Air to Fire
 * by Transmute: Primal Might
 * by Transmute: Skyfire Diamond

Blacksmithing
Many of these items require one or another of the specializations, and are Bind on Pickup.

General (Bind on Equip)

Requires Swordsmithing

Requires Axesmithing

Requires Hammersmithing

Requires Armorsmithing

Engineering

 * (Goblin Engineering)
 * (Gnomish Engineering)
 * (Gnomish Engineering)

Leatherworking

 * Belt of the Black Eagle (LW 375)
 * (LW 375)
 * Boots of the Crimson Hawk (LW 375)
 * (LW 365)
 * (LW 365)
 * (LW 345)
 * (LW 350)
 * (LW 360)
 * (LW 360)
 * (Dragonscale Leatherworking) (LW 375)
 * (Dragonscale Leatherworking) (LW 375)
 * (Dragonscale Leatherworking) (LW 375)
 * (Elemental Leatherworking) (LW 375)
 * (LW 365)
 * (Tribal Leatherworking) (LW 375)
 * (Tribal Leatherworking) (LW 375)
 * (Tribal Leatherworking) (LW 375)
 * (LW 365)
 * (LW 365)

Leg-only Armor Kits
 * (LW 335)
 * (LW 365)

Enchanting

 * Enchant Boots - Cat's Swiftness
 * Enchant Cloak - Greater Agility
 * Enchant Cloak - Major Resistance
 * Enchant Shield - Resistance