melem
- Product Name
- melem
- CAS No.
- 1502-47-2
- Chemical Name
- melem
- Synonyms
- melem;DK7462;Meleme;2,4,6-Triazine symmheptazine;1,3,4,6,7,9,9b-Heptaazaphenalen-2,5,8-triamin;2,5,8-Triamino-1,3,4,6,7,9,9b-heptaazaphenalene;1,3,4,6,7,9,9b-heptaazaphenalene-2,5,8-triamine;1,3,3a1,4,6,7,9-Heptaazaphenalene-2,5,8-triamine;2,5,8-Triamino-1,3,4,6,7,9,9b-heptaaza-9bH-phenalene;1,3,4,6,7,9,9b-Heptaaza-9bH-phenalene-2,5,8-triamine
- CBNumber
- CB2941039
- Molecular Formula
- C6H6N10
- Formula Weight
- 218.18
- MOL File
- 1502-47-2.mol
melem Property
- Boiling point:
- 348.86°C (rough estimate)
- Density
- 1.6205 (rough estimate)
- vapor pressure
- 0Pa at 20℃
- refractive index
- 1.9320 (estimate)
- storage temp.
- 2-8°C, protect from light
- pka
- -0.74±0.20(Predicted)
- Appearance
- White to off-white Solid
- Water Solubility
- 930μg/L at 20℃
- InChI
- InChI=1S/C6H6N10/c7-1-10-4-12-2(8)14-6-15-3(9)13-5(11-1)16(4)6/h(H6,7,8,9,10,11,12,13,14,15)
- InChIKey
- YSRVJVDFHZYRPA-UHFFFAOYSA-N
- SMILES
- N1=C2N3C(=NC(N)=N2)N=C(N)N=C3N=C1N
- LogP
- -0.2 at 20℃
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P330Rinse mouth.
P332+P313IF SKIN irritation occurs: Get medical advice/attention.
P337+P313IF eye irritation persists: Get medical advice/attention.
P362Take off contaminated clothing and wash before reuse.
P403+P233Store in a well-ventilated place. Keep container tightly closed.
P405Store locked up.
P501Dispose of contents/container to..…
N-Bromosuccinimide Price
- Product number
- M3538
- Product name
- Melem
- Packaging
- 1G
- Price
- $150
- Updated
- 2026/04/30
- Product number
- CHM0982880
- Product name
- 1,3,4,6,7,9,9B-HEPTAAZAPHENALENE-2,5,8-TRIAMINE
- Purity
- 95.00%
- Packaging
- 5MG
- Price
- $495.77
- Updated
- 2021/12/16
- Product number
- AR00AT2O
- Product name
- 1,3,4,6,7,9,9b-heptaazaphenalene-2,5,8-triamine
- Purity
- 95%
- Packaging
- 25mg
- Price
- $61
- Updated
- 2021/12/16
- Product number
- AS040563
- Product name
- Melem
- Purity
- 98%
- Packaging
- 100mg
- Price
- $62
- Updated
- 2021/12/16
- Product number
- AR00AT2O
- Product name
- 1,3,4,6,7,9,9b-heptaazaphenalene-2,5,8-triamine
- Purity
- 95%
- Packaging
- 50mg
- Price
- $84
- Updated
- 2021/12/16
melem Chemical Properties,Usage,Production
Chemical Properties
melem is a white or pale yellow powdery solid that is insoluble in common solvents (including acetone, chloroform, methanol, water, DMF, DMSO, etc.). It is chemically stable, with a thermal decomposition temperature exceeding 500 °C. However, it is prone to further condensation reactions at temperatures above 450 °C. It must be stored at room temperature (in a cool, dry place below 15 °C), protected from light and air, and kept in an inert gas atmosphere.
Characteristics
High absorption efficiency: melem possesses a 1,3-s-triazine (heptazine) core structure. This large conjugated structure confers it with a strong ability to absorb ultraviolet light. Compared to traditional triazine-based absorbers (such as UV-1577), melamine has a larger conjugated plane and, in theory, a higher molar extinction coefficient, meaning it has a greater capacity to absorb ultraviolet light.
Excellent thermal stability: The structure of melem is not destroyed until temperatures exceed 500°C. This sufficiently demonstrates that the heptazine ring itself possesses extremely high thermal stability.
Uses
1,3,4,6,7,9,9b-heptaazaphenalene-2,5,8-triamine can be used as organic synthesis intermediate and pharmaceutical intermediate, mainly used in laboratory research and development process and chemical production process.
Definition
ChEBI: Melem is a heptaazaphenalene.
Application
As a structural unit rather than a simple additive: melem is incorporated directly into the main chain or network of polymeric materials via chemical bonding (polymerisation). The resulting material thus possesses both structural properties and UV-absorbing capabilities.[1]
For high-performance coatings or films: utilising its high absorption rate coupled with thermal stability, it can be formulated into specialised coatings for application onto substrates requiring extreme weather resistance (such as outdoor architectural structures and aerospace components).[2]
Flammability and Explosibility
Not classified
Synthesis
Melem 4e was synthesized by heating cyanamide 5 (Fluka, ≥98%) or ammonium dicyanamide 6 (for preparation, see ref 24) or dicyandiamide 7 (Avocado, 99%) or melamine 1a (Fluka, purum, ≥99% (NT)). The commercial products were used as purchased: 80 mg of starting material (1.90 mmol of 5, 0.95 mmol of 6, 0.95 mmol of 7, or 0.63 mmol of 1a, respectively) was filled into a glass ampule (outer diameter, 16 mm; inner diameter, 12 mm). The ampule was sealed at a length of 120 mm and heated to 450 °C (heating rate: 1 °C min-1). After about 5 h at this temperature, the ampule was slowly (2 °C min-1) cooled to room temperature. After the ampule was opened, the typical smell of ammonia was detected. At the top of the ampule, colorless crystals were found which were identified by X-ray powder diffractometry as sublimated melamine. At the bottom, a white-beige powder containing melem was isolated. Melem C6N7(NH2)3. yield 60%. Anal. calcd for melem: H, 2.75; C, 33.03; N, 64.22. Found: H, 2.98; C, 32.62; N, 62.04.
Structure and conformation
melem consists solely of carbon, nitrogen and hydrogen, and is a molecular crystal. The molecules are primarily linked by hydrogen bonds, forming two layers of molecules with different orientations. In 2003, Wolfgang Schnick and colleagues determined the crystal structure of melamine, demonstrating that it is a stable intermediate in the formation of g-C3N4. Unlike g-C3N4, which exhibits amorphous characteristics, melamine possesses good crystallinity.
References
[1] Akinboye, A. J., Kim, K., Park, J., Kim, Y.-S., & Lee, J.-G. (2024). Contamination of ultraviolet absorbers in food: toxicity, analytical methods, occurrence and risk assessments. Food Science and Biotechnology, 33 8, 1805–1824. https://doi.org/10.1007/s10068-024-01566-4
[2] Naveed, M., Ali, S., Iqbal, J., Hussain, M. T., & Asgher, M. (2024). Combined computational and experimental study: Synthesis, DFT-calculated and experimental characterization and application of new s-triazine based fiber reactive UV absorbers. Journal of Molecular Structure, 1298, Article 136934. https://doi.org/10.1016/j.molstruc.2023.136934
melem Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from melem manufacturers
- Product
- Melem 1502-47-2
- Price
- US $2.00-5.00/kg
- Min. Order
- 1kg
- Purity
- 99%
- Supply Ability
- 100kg
- Release date
- 2025-06-19
- Product
- 1,3,4,6,7,9,9b-heptaazaphenalene-2,5,8-triamine 1502-47-2
- Price
- US $2.00/KG
- Min. Order
- 1g
- Purity
- 98%MIN
- Supply Ability
- ASK
- Release date
- 2020-01-07