Compose Material

★

Phlogiston

Phlogiston is a 1★ material in Honkai: Star Rail — see how to get it, its use, and related items right below on this page.

1★Compose Material

3How to obtain

Phlogiston is a material ★1 in Honkai: Star Rail. This item is not currently used to level up any character or Light Cone. Obtainable from 3 different sources in-game.

Last updated: 30/07/2026

The figures on this page come directly from gamevika's internal game data store (counted/read straight from the real records), not an estimate or copy from elsewhere.

Description

Tier 1 Synthesis Material

Lore

Particles that form the flame. Genius Society #2 Harald Punch proved its existence, but #3 Nyul Iman disproved it. #7 Bohdan overthrew Iman's conclusion and proved it again before getting killed by #4 Polka Kakamond days after announcing Phlogiston's existence. "Does it exist or not? We're not interested, frankly speaking."

How to obtain

Backwater Pass: Flamespawns or other enemies
Found in destructible objects in the Herta Space Station
Administrative District Shop

Stats

Rarity	★
Type	Compose Material
Stack limit	99,999

Official names in every language

Tiếng Việt	Chất Đốt
English	Phlogiston
日本語	燃素
한국어	플로지스톤
繁體中文	燃素
简体中文	燃素

Where to use it / Related tools

Material Planner →

Phlogiston is an upgrade material — check the Material Planner to see how much you need for the character you're building.

Same-type items

Solid Water Basic Ingredients Metal Gaseous Liquid Seed Discarded Ingenium Parts Human-Height Auspicious Crops Tranquility Broken Dreams Rusty Gear Distinctive Tattered Feather Mechanical Parts Virtual Particle Protein Rice Feather of Flame Core of Ice Eye of Lightning Vortex of Wind Quantum Ripples Leaf of Imaginary Meteoric Alloy Jade Abacus Unit Extract of Medicinal Herbs Tian Dong Confounding Hunger Old Molar Bough of Thought Deep Marrow Rock Salt Strange Matter of Destruction

← All items Material Planner →

FAQ

What is Phlogiston?

Tier 1 Synthesis Material

Where do you get Phlogiston?

Sources for Phlogiston: Backwater Pass: Flamespawns or other enemies · Found in destructible objects in the Herta Space Station · Administrative District Shop. See the “How to obtain” section above for details on each source.

What type of item is Phlogiston?

Phlogiston is a 1★ material in Honkai: Star Rail, in the “Compose Material” category.

What is Phlogiston used for?

Phlogiston currently isn't listed as required by any character ascension, Light Cone ascension, or crafting recipe in official data.

Understand the mechanics behind this 4

Trailblaze Power guide: best ways to spend it, Fuel, Jade refreshes, and your daily farming route→ Efficient Material Farming in Honkai: Star Rail: Calyx, Stagnant Shadow, Echo of War, and a Weekly Route→ Assignments Guide: Who to Send Where for Max Passive Materials and Credits→ How to Farm Credits in Honkai: Star Rail (Never Go Broke Leveling Traces & Relics)→