Arcane Dust

Arcane Dust is disenchanted from any Outland level 66-120 gear. Used in various 320 enchanting skill formulas.

As an ingredient
This item is used in the following:

Tailoring

 * Arcanoweave Boots
 * Arcanoweave Bracers
 * Arcanoweave Robe
 * Bolt of Imbued Netherweave

Blacksmithing

 * Enchanted Adamantite Belt
 * Enchanted Adamantite Boots
 * Enchanted Adamantite Breastplate
 * Enchanted Adamantite Leggings

Engineering

 * Cogspinner Goggles
 * Gnomish Poultryizer
 * Power Amplification Goggles

Leatherworking

 * Riding Crop

Enchanting

 * Superior Mana Oil
 * Superior Wizard Oil
 * Enchant 2H Weapon - Major Agility
 * Enchant 2H Weapon - Savagery
 * Dexterity
 * Fortitude (boots enchant)
 * Vitality (boots enchant)
 * Brawn (enchant)
 * Fortitude (bracer enchant)
 * Greater Dodge (bracers enchant)
 * Lesser Assault
 * Enchant Bracer - Stats
 * Dodge (chest enchant)
 * Exceptional Health
 * Enchant Chest - Exceptional Stats
 * Major Resilience
 * Versatility Prime (chest enchant)
 * Greater Agility (cloak enchant)
 * Major Armor
 * PvP Power (enchant)
 * Assault (gloves enchant)
 * Blasting
 * Major Strength (gloves enchant)
 * Precise Strikes (enchant)
 * Lesser Dodge (shield enchant)
 * Major Stamina (shield enchant)
 * Parry (enchant)
 * Enchant Weapon - Executioner
 * Enchant Weapon - Greater Agility
 * Major Striking
 * Enchant Weapon - Mongoose
 * Enchant Weapon - Potency
 * Enchant Weapon - Spellsurge

As a quest objective
This item is an objective for the following quests:
 * Dumphry's Request
 * Rohok's Request

Trivia
Could be crafted from 1x Arcane Crystal in the BC beta.