prep of carbamide peroxide

[Vegeta]

I have come across a substance synthesis for carbamide peroxide:
Using a mortar and pestle, crush 20g urea into a powder. Place this in a shallow pyrex dish and add, with stirring, 35ml of a 30% hydrogen peroxide solution. The resulting mixture should have a dough consistency. Stir in 1.5g of powdered gelatine. Let the mixture stand for 5 hours, it will solidify, forming the carbamide peroxide. Uses: In smoke compositions. Mixtures with sodium dithionite are impact sensitive.

Carbamide peroxide CO(NH2)2*H2O2

Properties: White crystals or crystalline powder; melting point (decomposes) 75-85C. Decomposed by moisture and temperatures about 40C. Soluble in water, alcohol, and ethylene glycol. Solvents such as ether and acetone extract the hydrogen peroxide and may form explosives solutions. Active oxygen (minimum) 16%.

Uses: Source of water-free hydogen peroxide, bleaching; disinfectant; cosmetics; pharmaceuticals; blue print developer; modification of starches.

Fire hazard: Dangerous.

[Madog555]

this looks kinda cool. fun to burn like yellow powder, doesnt have mutch recreational use.

Let's keep this on topic. If it's not about carbamide peroxide it shouldn't be in this thread

<small>[ June 05, 2002, 07:32 PM: Message edited by: Anthony ]</small>

[Pu239 Stuchtiger]

Carbamide peroxide is not explosive.

<small>[ June 05, 2002, 08:54 PM: Message edited by: PYRO500 ]</small>

[inferno]

How well does it make smoke? Is it added to ready made smoke comps like NH4Cl is to enhance the performance? Does it burn itself? Can it be used straight with an oxidiser for smoke, or need to be a third ingredient?

[Alchemist]

Hello all,



Safety data for carbamide peroxide

General

Synonyms: urea compounded with hydrogen peroxide (1:1), percarbamide, urea peroxide, gly-oxide, hydroperit,
hydroperite, hyperol, thenardol [over-the-counter drug]
Molecular formula: CH6N2O3
CAS No: 123-43-6
EC No:

Physical data

Appearance: white crystals or powder
Melting point: 75 - 85 C (decomposes)
Boiling point:
Vapour density:
Vapour pressure:
Density (g cm-3): 1.4
Flash point:
Explosion limits:
Autoignition temperature:
Water solubility:


Stability

Severe explosion hazard on exposure to shock or heat. Incompatible with strong oxidizing agents, organic
materials, reducing agents. May form explosive solutions with ether or propanone.

Toxicology

Skin, eye and respiratory irritant.

Toxicity data
(The meaning of any abbreviations which appear in this section is given here.)

Risk phrases
(The meaning of any risk phrases which appear in this section is given here.)
R36 R37 R38.

Transport information

Personal protection

Safety glasses.

<small>[ June 12, 2002, 10:00 AM: Message edited by: Alchemist ]</small>

[BrushFire]

Hey vegeta, ive always been interested in the preperation of unuiqe things involving chemistry such as carbamide peroxide. I'd like to know where you got all this information so I may delve into it a bit more, maybe find someone who has made it before so i can learn alittle more about its production.

can u post where u found all that information?

[Pu239 Stuchtiger]

Email me.