Red Phazon

Red Phazon is a more dangerous kind of Phazon than the blue Phazon that appears on planet Tallon IV. Though not identified as Phazon in-game, the Metroid Prime and Metroid Fusion: Prima's Official Strategy Guide refers to it as "red Phazon" in one instance. In Metroid Prime: The Official Nintendo Player's Guide, in the section titled "Nuclear Poison", it is merely referred to as "radioactive sludge".

Description
This Phazon was found by Samus Aran deep in Tallon IV's Impact Crater. Although Samus has the Phazon Suit, it still damages Samus on contact despite the fact that the Phazon Suit protects her from radiation of Phazon. According to the Scan Visor, its mutagenic properties are 86% stronger than standard blue Phazon.

Its origins and relation to the blue Phazon are unknown, but it is possibly just high concentrations of Phazon trapped in the Crater. Other explanations are that the color is due to the decay of the deceased Leviathan, or the planet's core colored it red. It is interesting that red Phazon doesn't show up on Phaaze, suggesting that it is a new kind of Phazon unique to the Tallon IV Leviathan. However, it is also possible that red Phazon makes up part or all of Phaaze's subterranean makeup, similar to magma in the earth's mantle; this is supported by the fact that it is only encountered near the core of the Leviathan, which is essentially a miniaturized version of Phaaze itself.

A variation of normal Phazite, known as Red Phazite, appears in Metroid Prime 3: Corruption. This substance may or may not be linked to red Phazon. In the same game, there is a rare being made of Phazon called the Red Phaazoid in which its scan reveals that its unnatural color is the result of an unstable core present during its creation. It is unknown if this explanation somehow applies to the Red Phazon.

Scan
"Limited data on unknown material available. Material is highly radioactive. You will take damage from direct contact. Mutagenic qualities at least 86% greater than Phazon. Unshielded bioforms below index level P will suffer fatality within moments."