3,6-Dihydroxyphthalonitrile (2,3-Dicyanohydroquinone / 3,6 - ) CAS 4733-50-0 Full Export Specification

1. Basic Chemical Identification

• IUPAC Name: 3,6-dihydroxybenzene-1,2-dicarbonitrile
• Aliases: 2,3-Dicyanohydroquinone, 2,3-Dicyano-1,4-hydroquinone, 3,6 
• CAS No.: 4733-50-0
• EINECS: 225-241-0
• MDL No.: MFCD00001790
• Molecular Formula: \(\boldsymbol{C_8H_4N_2O_2}\)
• Molecular Weight: 160.13
• SMILES: N#Cc1c(O)ccc(O)c1C#N
• HS Code: 2926909090
• UN Number: UN 2811
• IMDG Hazard Class: Class 6.1 Toxic Organic Solid, Packing Group II
• Signal Word: Danger

2. Physical & Chemical Properties

1. Appearance: Khaki to light brown crystalline powder, odorless
2. Melting Point: 245 ℃ (decomposes above melting point)
3. Boiling Point: 443.5 ℃ @760 mmHg
4. Density (20 ℃): 1.53 g/cm³
5. Flash Point: 222 ℃
6. Refractive Index: 1.668
7. Solubility: Slightly soluble in cold water, soluble in hot water, methanol, ethanol, DMF, DMSO; insoluble in alkanes, benzene, ether
8. Stability
   • Stable under cool, light-proof sealed storage; darkens slightly under long-term strong UV light
   • Contains phenolic hydroxyl & cyano dual functional groups; undergoes etherification, condensation, cyclization, complexation reactions
   • Reacts violently with strong oxidants, strong concentrated alkalis; incompatible with heavy metal salts
9. Core Hazards
   • H301+H311+H331: Toxic if swallowed, skin contact or inhaled; dust causes systemic mild organ toxicity
   • H315: Irritates skin; H319: Severe eye irritation
   • H335: Irritates respiratory tract mucosa
   • WGK Germany 2: Harmful to aquatic life with medium bioaccumulation risk

3. Standard COA Technical Specifications

Industrial Phthalocyanine Intermediate Grade ≥99.0% (Main Bulk Export Grade)

High-Purity Electronic Grade ≥99.8%

4. Main Industrial Applications

1. Phthalocyanine Dye & Functional Pigment Core Monomer (Largest Consumption)

2. Organic Semiconductor & Optoelectronic Material Intermediate

3. Pharmaceutical & Fine Chemical Building Block

4. Laboratory Synthetic Reagent

5. Photoresist & Photosensitive Auxiliary Intermediate

5. Export Packaging & Storage Transportation

Standard Packing Options

1. Industrial bulk: 25kg fiber drum with double PE light-proof moisture-proof inner liner, fully airtight sealed lid
2. Lab small packing: 100g / 500g amber sealed plastic bottle
   
   
   All pallets fixed with anti-slip steel strapping, fully wrapped waterproof light-shield composite film; transit temperature ≤25 ℃, avoid high humidity and direct sunlight

Storage Mandatory Rules

• Warehouse: Cool, dark, ventilated Class6.1 toxic solid chemical warehouse, humidity <70%
• Fully sealed to prevent moisture absorption and dust leakage
• Strict segregate from oxidants, strong alkalis, heavy metal powders, food raw materials
• Equipped with toxic dust alarm and negative-pressure exhaust ventilation

Ocean Transport Rules

6. GHS Full Hazard Statements & Mandatory PPE

Hazard Statements

• H301: Toxic if swallowed
• H311: Toxic in contact with skin
• H315: Causes skin irritation
• H319: Causes serious eye irritation
• H331: Toxic if inhaled
• H335: May cause respiratory irritation
• H412: Harmful to aquatic life with long lasting effects

Mandatory PPE

1. Dust half-face respirator with P2 particulate filter cartridge; full-face positive-pressure SCBA for large feeding & melting operations
2. Double protection: fully sealed chemical safety goggles + full anti-dust splash face shield
3. Nitrile rubber impermeable gloves
4. Dust-proof impermeable anti-toxic protective overalls + chemical resistant rubber boots
5. Local negative-pressure closed exhaust fume hood for weighing, sampling and feeding operations

Spill & First Aid Emergency Treatment

1. Spill disposal: Evacuate irrelevant personnel, cover crystalline powder with dry inert sand to suppress dust; collect residues into airtight toxic plastic barrels for professional incineration; prohibit direct discharge to sewer or water body
2. Skin contact: Remove contaminated clothes instantly, flush skin with plenty of soapy running water ≥15 minutes
3. Eye contact: Irrigate eyes with continuous clean running water minimum 15 minutes, seek ophthalmic treatment
4. Inhalation: Move victim to fresh air, supply oxygen for cough and throat irritation
5. Ingestion: Do NOT induce vomiting; drink large volume milk/clean water to relieve toxicity, transport patient to toxic emergency center with SDS document

7. Foreign Trade Selling Advantages

1. Two grades available: industrial phthalocyanine pigment bulk grade & high-purity electronic optoelectronic grade, ultra-low single-cyano impurities to guarantee pure color and high photoelectric conversion efficiency of downstream phthalocyanine products
2. Double-layer light-proof moisture-proof fiber drum packaging, no agglomeration or discoloration during long cross-ocean sea transit
3. Complete Class6.1 toxic dangerous goods export document set (COA, English SDS, UN packaging certificate, IMDG maritime declaration, certificate of origin, heavy metal impurity inspection report)
4. Flexible supply: small trial sealed bottles, 25kg fiber drums and full FCL bulk shipments
5. Unique dual hydroxyl-dicyano functional structure, stable cyclization reactivity, long-term supplier for global phthalocyanine pigment, organic semiconductor and fine chemical manufacturers

8. Full Set Export Supporting Documents

• Batch Certificate of Analysis (COA)
• English SDS Safety Data Sheet (toxic cyano-aromatic solid special version)
• Dangerous Goods Packaging Qualification Certificate (UN2811)
• IMDG Maritime Dangerous Goods Declaration File (Class6.1 PG II)
• Certificate of Origin
• Mono-cyano & heavy metal impurity compliance test report