This page describes an education-related feature. This feature is available only in Minecraft Education or when enabling the "Education" option in Bedrock Edition. This feature is exclusive to Bedrock Edition and Minecraft Education.
Underwater TNT
Renewable
No
Stackable
Yes (64)
Tool
Any tool
Blast resistance
0
Hardness
0
Luminous
No
Transparent
Partial
Flammable
Yes
Catches fire from lava
Yes Underwater TNT is a block that can be used by the player to initiate a controlled explosion underwater.
Contents
1Obtaining
1.1Breaking
1.2Crafting
2Usage
2.1Behavior
3Sounds
3.1Generic
3.2Unique
4Data values
4.1ID
4.2Block state
5Trivia
6History
7Issues
Obtaining[]
Breaking[]
Underwater TNT can be broken instantly using any tool, or without a tool. However, primed underwater TNT cannot be broken, as it is an entity.
Crafting[]
Ingredients
Crafting recipe
Sodium +TNT
Usage[]
Main article: TNT § Usage
Underwater TNT blocks can be activated the same way as a normal TNT block.
Behavior[]
Once activated, it explodes like a normal TNT block. However, unlike the TNT block, it can destroy blocks underwater. It can still explode in the air, although it does not work in lava. Underwater TNT has the same delayed detonation rate as normal TNT.
Sounds[]
Generic[]
Sound
Source
Description
Resource location
Volume
Pitch
Blocks
Once the block has broken
dig.grass
0.7
0.8-1.0
Blocks
When the block is placed
dig.grass
0.8
0.8-1.0
Blocks
While the block is in the process of being broken
hit.grass
0.3
0.5
Players
Falling on the block with fall damage
fall.grass
0.4
1.0
Players
Walking on the block
step.grass
0.3
1.0
Players
Jumping from the block
jump.grass
0.11
1.0
Players
Falling on the block without fall damage
land.grass
0.21
1.0
Unique[]
Sound
Source
Description
Resource location
Volume
Pitch
Blocks
When an underwater TNT block is lit
random.fuse
1.0
1.0
Blocks
When an underwater TNT block explodes
random.explode
4.0
1.0
Data values[]
ID[]
Name
Identifier
Numeric ID
Form
Item ID[i 1]
Translation key
Underwater TNT
tnt
46
Block & Giveable Item[i 2]
Identical[i 3]
tile.underwater_tnt.name
↑ID of block's direct item form, which is used in savegame files and addons.
↑Available with /give command.
↑The block's direct item form has the same id as the block.
Name
Identifier
Numeric ID
Translation key
Primed Underwater TNT
tnt
65
entity.tnt.name
Block state[]
Name
Metadata Bits
Default value
Allowed values
Values forMetadata Bits
Description
allow_underwater_bit
0x2
false
false
0
This is normal TNT.
true
1
This is Underwater TNT.
explode_bit
0x1
false
false
0
Hitting the TNT block breaks it, dropping it as an item that can be picked up.
true
1
Hitting the TNT block causes it to ignite and then explode.
Trivia[]
The inclusion of sodium is a reference to elemental sodium's explosive reaction with water. All alkaline metals react with water violently to form hydrogen gas and a hydroxide. The heat generated often ignites the gas.
History[]
Bedrock Edition
1.4.0
beta 1.2.20.1
Added underwater TNT.
Education Edition
1.0.27
Added underwater TNT.
Issues[]
Issues relating to "Underwater TNT" are maintained on the bug tracker. Report issues there.
This page describes an education-related feature. This feature is available only in Minecraft Education or when enabling the "Education" option in Bedrock Edition. 
This feature is exclusive to Bedrock Edition and Minecraft Education. 
Added underwater TNT.