ChemicalBook > CAS DataBase List > Melamine

Melamine

Product Name
Melamine
CAS No.
108-78-1
Chemical Name
Melamine
Synonyms
1,3,5-Triazine-2,4,6-triamine;Aero;Cymel;Triaminotriazine;Melamin;trimeric cyanamide;2,4,6-Triamino-s-triazine;2,4,6-Triamino-1,3,5-triazine;1,3,5-Triazine-2,4,6-triamine (Melamine);Teoharn
CBNumber
CB6324023
Molecular Formula
C3H6N6
Formula Weight
126.12
MOL File
108-78-1.mol
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Melamine Property

Melting point:
>300 °C (lit.)
Boiling point:
224.22°C (rough estimate)
Density 
1.573
bulk density
800kg/m3
vapor pressure 
66.65 hPa (315 °C)
refractive index 
1.872
Flash point:
>110°C
storage temp. 
no restrictions.
solubility 
water: soluble25mg/mL, clear to slightly hazy, colorless
pka
5(at 25℃)
form 
Fine Crystalline Powder
color 
White
PH
7-8 (32g/l, H2O, 20℃)
Water Solubility 
3 g/L (20 ºC)
Merck 
14,5811
BRN 
124341
Stability:
Stable. Incompatible with strong acids, strong oxidizing agents. Nonflammable.
InChIKey
JDSHMPZPIAZGSV-UHFFFAOYSA-N
LogP
-1.22 at 20℃
CAS DataBase Reference
108-78-1(CAS DataBase Reference)
NIST Chemistry Reference
1,3,5-Triazine-2,4,6-triamine(108-78-1)
IARC
2B (Vol. Sup 7, 73, 119) 2019
EPA Substance Registry System
Melamine (108-78-1)
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Safety

Hazard Codes 
Xi,Xn
Risk Statements 
43-44-20/21
Safety Statements 
36/37
RIDADR 
3263
WGK Germany 
1
RTECS 
OS0700000
Autoignition Temperature
>600 °C
TSCA 
Yes
PackingGroup 
III
HS Code 
29336980
Hazardous Substances Data
108-78-1(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 3161 mg/kg LD50 dermal Rabbit > 1000 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Precautionary statements

P201Obtain special instructions before use.

P202Do not handle until all safety precautions have been read and understood.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P308+P313IF exposed or concerned: Get medical advice/attention.

P405Store locked up.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
8.08614
Product name
2,4,6-Triamino-1,3,5-triazine
Purity
for synthesis
Packaging
100g
Price
$35.5
Updated
2024/03/01
Sigma-Aldrich
Product number
1379183
Product name
Melamine
Purity
United States Pharmacopeia (USP) Reference Standard
Packaging
250mg
Price
$436
Updated
2024/03/01
TCI Chemical
Product number
T0337
Product name
Melamine Monomer
Purity
>98.0%(HPLC)(T)
Packaging
25g
Price
$17
Updated
2024/03/01
TCI Chemical
Product number
T0337
Product name
Melamine Monomer
Purity
>98.0%(HPLC)(T)
Packaging
500g
Price
$20
Updated
2024/03/01
Alfa Aesar
Product number
A11295
Product name
Melamine, 99%
Packaging
500g
Price
$25
Updated
2024/03/01
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Melamine Chemical Properties,Usage,Production

Description

Melamine-formaldehyde resin (MFR) is an active ingredient of strong (reinforced) plasters. Sensitization was reported in a plaster-room technician, who applied resin-reinforced pIaster casts, and in dental technicians. MFR was contained in a strong dental pIaster used for mouldings. Used as a textile finish res in, it was also found to be an allergen in a women who replaced clothes in a store. MFR also releases formaldehyde, which may be the sensitizer.

Chemical Properties

Melamine is a white solid organic compound whose molecules consist of a sixmembered heterocyclic ring of alternate carbon and nitrogen atoms with three amino groups attached to the carbons. Condensation polymerization with methanal or other aldehydes produces melamine resins, which are important thermosetting plastics.

Uses

Forms synthetic resins with formaldehyde.

Uses

It is used to make high-pressure laminating resins (e.g., decorative countertops), molded compounds (e.g., dinnerware), and surface coating resins (e.g., appliance finishes and automotive topcoats). Additional major products are textile and paper treatment resins. Miscellaneous uses include adhesive resins for gluing lumber, plywood, and flooring, and resins for leather tanning agents. Melamine, melamine cyanurate, other melamine salts, and guanidine compounds are currently the most used group of nitrogencontaining flame retardants. Melamine is used as a flame retardant additive for polypropylene and polyethylene. Melamine cyanurate is employed commercially as a flame retardant for polyamides and terephthalates.

Production Methods

The compound now is synthesized from urea.

Definition

ChEBI: Melamine is a trimer of cyanamide, with a 1,3,5-triazine skeleton. It has a role as a xenobiotic metabolite. It is functionally related to a cyanamide. It is a conjugate base of a melamine(1+).

Definition

melamine: A white crystalline compound,C3N6H6. Melamine is a cycliccompound having a six-memberedring of alternating C and N atoms,with three NH2 groups. It can becopolymerized with methanal to givethermosetting melamine resins,which are used particularly for laminatedcoatings.

Production Methods

Melamine is prepared almost exclusively by the urea process—the action of ammonia on urea. It is produced worldwide.

Preparation

The standard route to melamine is from urea. Urea is heated in the presence of ammonia at 250-350??C and 4--20 MPa. The reaction probably involves the simultaneous dehydration and hydration of urea to form cyanamide and ammonium carbamate; trimerization of the cyanamide then leads to melamine:


Thus only 50% of the urea used gives melamine in one step and ammonium carbamate has to be separated and converted to urea for recycling. Despite this limitation, the urea route is the most economical of currently available routes.

General Description

Colorless to white monoclinic crystals or prisms or white powder. Sublimes when gently heated.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Melamine is incompatible with strong oxidizing agents and strong acids . Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.

Hazard

Toxic by ingestion, skin, and eye irritant. Questionable carcinogen.

Fire Hazard

Literature sources indicate that Melamine is nonflammable.

Contact allergens

Melamine-formaldehyde resin (MFR) results from condensation of melamine and formaldehyde. It is anactive ingredient of strong (reinforced) plasters, such as industrial or some dental plasters used for molding.It is also used as a textile finish resin. MFR acts as an allergen generally because of formaldehyde releasing (see Chap. 40)

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. An eye, skin, and mucous membrane irritant. Causes dermatitis in humans. Questionable carcinogen with experimental carcinogenic and tumorigenic data. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx and CN-.

Potential Exposure

Manufactured from urea, melamine is used in the manufacture of plastics, melamineformaldehyde resins; rubber, synthetic textiles; laminates, adhesives, and molding compound

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.

Carcinogenicity

A bioassay of melamine was conducted in rats and mice by NTP. Male F344 rats and B6C3F1 mice were administered melamine in their diets at concentrations of 2250 or 4500 ppm daily for 103 weeks.Female rats were fed 4500 or 9000 ppm melamine. At the end of 111 weeks, surviving animals were killed and examined.

storage

Color Code—Blue: Health Hazard/Poison: Store in a secure poison location. Prior to working with this chemical you should be trained on its proper handling and storage. Store in tightly closed containers in a cool, well-ventilated area away from strong oxidizers and strong acids. Where possible, automatically pump liquid from drums or other storage containers to process containers. A regulated, marked area should be established where this chemical is handled, used, or stored in compliance with OSHA Standard 1910.1045.

Purification Methods

Crystallise Melamine from water or dilute aqueous NaOH. It sublimes at ~240o on prolonged heating. [Beilstein 26 I 74, 26 II 132, 26 III/IV 1253.]

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Melamine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents such as hydrides, nitrides, alkali metals, and sulfides.

Toxics Screening Level

The initial risk screening level (IRSL) for melamine is 1.5 μg/m3 based on an annual averaging time.

Melamine Preparation Products And Raw materials

Raw materials

Silica gel Bifenthrin Dicyandiamide 4-Chlorobenzaldehyde POLYAMIDE 6 HPLC 0.005-0.020MM (5-20UM)& Urea Methanol solvent Quartz Ammonia

Preparation Products

Early-strength admixture water proofing agent 703 softener PEG Fluorescent Brightener BC REACTIVE GREEN 19 REACTIVE BLUE 4 Various color amino baking enamel A04-9 demulsifier KN-1 modified phenol-formaldehyde resin Pumping agent Amino resin varnish finishing agent KB for polyester viscose blend anchorage used for glassine paper PAINT MELAMINE RESIN Amino resin paint conductive coating-composite system of acrylic copolymer and cuprous iodide Slushing agent,high efficiency Amino moulding plastic Acid Red 92 Trimethylolmelamine Resin Boron nitride
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Melamine Suppliers

Australia 3 Austria 1 Belgium 4 Brazil 3 Canada 6 Chile 1 China 510 Czech 1 Czech Republic 1 Denmark 2 Egypt 1 Europe 3 France 6 Germany 16 India 159 Iran 1 Ireland 1 Italy 6 Japan 12 Jordan 1 Malaysia 3 Mexico 3 Poland 2 Qatar 1 Romania 1 Russia 5 Singapore 2 Slovakia 1 South Korea 5 Spain 4 Switzerland 3 The Netherlands 7 Trinidad And Tobago 1 Turkey 1 United Arab Emirates 2 United Kingdom 13 United States 73 USA 1 Global 866
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View Lastest Price from Melamine manufacturers

Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
Melamine 108-78-1
Price
US $10.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20ton
Release date
2024-05-16
Hebei Saisier Technology Co., LTD
Product
Melamine 108-78-1
Price
US $6.00/KG
Min. Order
1KG
Purity
More than 99%
Supply Ability
2000KG/Month
Release date
2024-04-22
Hebei Mujin Biotechnology Co.,Ltd
Product
Melamine 108-78-1
Price
US $100.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
5000kg/week
Release date
2023-06-05

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