2-Aminophenol Bulk Procurement Specs & Purity Guide
Aligning 2-Aminophenol Bulk Orders with UNSPSC Code 12352104 Compliance Standards
Procurement managers sourcing 2-Aminophenol (CAS: 95-55-6) must align purchase orders with standardized classification systems to ensure accurate logistics handling and tariff coding. The United Nations Standard Products and Services Code (UNSPSC) 12352104 specifically categorizes this chemical under Amines and Imine Compounds. Correct classification is critical for customs clearance and hazardous goods documentation. At NINGBO INNO PHARMCHEM CO.,LTD., we ensure all commercial invoices and packing lists reflect this code to streamline import procedures for global manufacturers.
Understanding the regulatory landscape is essential, but physical compliance begins with accurate identification. This compound, also known as o-aminophenol or 2-hydroxyaniline, requires precise labeling to distinguish it from structural isomers like 4-aminophenol. Misclassification can lead to shipment delays or incorrect safety handling protocols at the port of discharge. Procurement teams should verify that the HS Code and UNSPSC references on the supplier's documentation match the intended industrial application, whether for dye intermediates or pharmaceutical synthesis.
Defining Critical Purity Grades and Assay Specifications for Bulk 2-Aminophenol
Industrial purity is not a monolithic standard; it varies significantly based on the downstream application. For hair dye formulations and polymer synthesis, the assay specification typically demands higher consistency compared to general agrochemical intermediates. The chemical building block must meet specific melting point ranges and HPLC purity thresholds to ensure reaction reproducibility. Below is a technical comparison of common grade specifications found in the market:
| Parameter | Industrial Grade | Pharma / Dye Grade | Test Method |
|---|---|---|---|
| Assay (GC/HPLC) | ≥ 97.50% | ≥ 99.00% | Area Normalization |
| Melting Point | 170°C - 174°C | 174°C - 177°C | Capillary Method |
| Appearance | Off-White to Beige | Ivory White Crystals | Visual / Colorimeter |
| Water Content | ≤ 0.50% | ≤ 0.10% | Karl Fischer |
When evaluating a reliable supplier, request historical batch data to verify consistency. Variations in the synthesis route can lead to different impurity profiles even if the main assay meets the minimum threshold. For detailed specifications on our high-purity intermediate suitable for hair dye use, review our 2-Aminophenol product page for current availability.
Analyzing Impurity Profiles and Trace Metal Limits for Industrial 2-Aminophenol
Beyond the primary assay, the stability of ortho-aminophenol during storage is heavily influenced by trace metal contaminants and exposure to oxygen. A critical non-standard parameter often overlooked in basic COAs is the color stability trajectory over time. Freshly produced material typically presents as ivory white to parchment-colored crystals. However, without adequate stabilization or nitrogen blanketing, the product can shift to a sand-beige or light brown crystalline solid due to oxidative degradation.
This color shift is not merely cosmetic; it indicates the formation of quinone-imine type oxidation products which can interfere with downstream coupling reactions in dye manufacturing. Trace metals such as iron and copper act as catalysts for this oxidation. Procurement specifications should explicitly limit heavy metals (e.g., Fe < 10 ppm, Cu < 5 ppm) even if not mandated by general pharmacopeia standards for industrial grades. Our quality assurance teams monitor these trace limits to ensure the manufacturing process yields a stable product that maintains integrity during extended storage periods.
Mandatory Certificate of Analysis Parameters for Quality Assurance and Audit Readiness
Audit readiness requires a comprehensive Certificate of Analysis (COA) that goes beyond simple pass/fail metrics. For regulated industries, the COA must include batch numbers, manufacturing dates, and specific test methods used (e.g., USP, EP, or Internal SOP). Key parameters that must be documented include identification (IR spectrum), assay, melting point, and residue on ignition.
Procurement officers should ensure the COA provides clear traceability. If specific numerical data for a particular batch is required for validation, please refer to the batch-specific COA provided upon request. Consistency in documentation is as vital as chemical consistency. Discrepancies between the COA and the physical label can trigger quality alerts during raw material intake inspections. Maintaining a robust document trail supports compliance with internal quality management systems and facilitates smoother technology transfer processes.
Industrial Bulk Packaging Standards and Hazardous Goods Shipping Compliance for Phenols
2-Aminophenol is classified as a hazardous substance during transport, typically falling under UN Number UN2512. Proper packaging is essential to prevent moisture ingress and oxidation, which degrade product quality. Standard export packaging involves 25kg net weight HDPE woven bags equipped with a 3-layered inner bag system (Polyethylene + Aluminium Foil + Polyester Liner).
For enhanced stability, the inner bags are sealed with nitrogen purging to displace oxygen. An additional LDPE liner is often used inside the 3-layered inner bag for added protection against humidity. UN Approved bags or HDPE drums are utilized for international shipping to comply with hazardous goods regulations. It is crucial to store these containers in cool, dry conditions in well-sealed environments. For insights on how this material functions as a drop-in replacement in specific formulations, see our article on 2-Aminophenol Drop-In Replacement Hair Dye. Adhering to these packaging standards ensures the material arrives within specification limits.
Frequently Asked Questions
What is the solubility profile of 2-Aminophenol in common solvents?
2-Aminophenol is soluble in water (approximately 17 g/L at 20°C), alcohol, and ether. It is slightly soluble in water but shows higher solubility in organic solvents like acetone and alcohols, which is critical for formulation processes.
How does storage affect the physical appearance of the chemical?
Over time, exposure to air can cause the ivory white crystals to turn sand-beige or light brown due to oxidation. Proper nitrogen purging and sealed storage mitigate this color shift.
Is 2-Aminophenol the same as 4-Aminophenol?
No, they are positional isomers. In 2-Aminophenol, the amino group is at the ortho position (2nd carbon), whereas in 4-Aminophenol, it is at the para position (4th carbon), resulting in different reactivity and bonding properties.
What is the typical melting point range for procurement specs?
The standard melting point range is typically between 170°C and 177°C. Exact values depend on the purity grade and should be verified against the batch-specific COA.
Sourcing and Technical Support
Securing a consistent supply of high-quality intermediates requires a partner with robust engineering capabilities and transparent quality controls. We prioritize clear communication regarding specifications, quantity, and delivery to ensure a smooth procurement process for your manufacturing needs. For custom synthesis requirements or to validate our drop-in replacement data, consult with our process engineers directly.