Pigment Red 4 (Starwin Red 4)

产品概览

Pigment Red 4, also known as Para Red, is a classic monoazo organic pigment belonging to the β-naphthol azo chemical class. It features a yellowish red hue with good color strength and reliable performance across a wide range of industrial applications. With moderate heat resistance up to 150°C and light fastness of Grade 4–5, PR4 is widely used in printing inks, coatings, plastics, and rubber products.

Starwin Red 4商业级耐晒红4由杭州星威科技有限公司供应。该产品制造精良，确保色力稳定、色泽均匀，并实现批次间高度一致的可重复性。

密钥标识

Property	价值
Product Name (EN)	Para Red
Commercial Name	Starwin Red 4
C.I. Name	Pigment Red 4
客户编号	12085
CAS 编号	6410-19-1
EC No.	229-074-1
Molecular Formula	C₁₇H₁₃N₃O₃
分子量	295.30 g/mol
化学类别	Monoazo (β-Naphthol type)
外观	红粉
Color Shade	黄红色

Technical Specifications

以下数据为 Starwin Red 4 的典型性能指标。实际数值可能因批次略有差异，具体请以每批次的《分析证书》（COA）和《技术数据表》（TDS）为准。

Parameter	规格
纯净	≥95.0%
湿度	≤1.5%
pH 值	6.5 – 8.0
吸油	40 – 55 g/100g
Density	1.35 – 1.55 g/cm³
Heat Resistance	最高150°C
耐光性（全色）	Grade 4 – 5
耐光性 (1/3 标准)	Grade 3 – 4
Weather Fastness (Full Shade)	Grade 2 – 3
Migration Resistance (PVC)	Grade 2 – 3
Acid Resistance	Grade 3 – 4
耐碱性	Grade 4
Solvent Resistance	Good
Key Applications	Printing inks, coatings, plastics, rubber
包装	25kg/bag 带内衬 PE
存储	存放于阴凉、干燥、通风处，避免阳光直射
HS Code	32041700

How to Interpret These Specifications

• 耐光性（4–5 全色）: Moderate. Suitable for indoor and short-term outdoor applications. For long-term exterior exposure, consider higher-performance alternatives such as PR48:2 or PR57:1.
• 耐热性（最高 150°C）: Moderate. Suitable for standard plastic processing temperatures but not recommended for high-temperature engineering plastics.
• Weather Fastness (2–3 full shade): Limited. Not recommended for long-term outdoor exposure without overcoat protection.
• Migration Resistance (PVC Grade 2–3): Fair. May exhibit some migration in soft PVC. Verify compatibility with your specific formulation.
• Acid/Alkali Resistance: Good alkali resistance (Grade 4) but moderate acid resistance (Grade 3–4). Suitable for most standard formulation environments.

关键应用领域

1. Printing Inks (Primary Application)

• 偏移油墨: PR4 provides bright yellowish red coloration in sheet-fed and web offset ink systems.
• Water-Based Inks: Used in water-based flexographic and gravure ink formulations for packaging and label printing.
• Gravure Inks: Suitable for solvent-based gravure printing on various substrates.

2. 涂层

• Interior Coatings：适用于室内装饰和工业涂层，对耐光性要求不高的场合。
• General-Purpose Paints：用于非高要求场景中的经济型涂料配方。

3. Plastics & Rubber

• PVC: Suitable for rigid PVC applications where migration is less of a concern.
• PE & PP: Can be used in polyolefin coloring at processing temperatures below 150°C.
• 橡胶制品: Used as a colorant in rubber compounding for footwear, gaskets, and industrial rubber goods.

4. 其他应用

• 纺织品印花: Used in pigment printing pastes for textile applications.
• Leather Finishing: Used in leather coating formulations for coloration.

重要提示：

• 颜料红 4 是classic monoazo pigment valued for its yellowish red hue and good color strength at a competitive price point.
• 它是mainly recommended for printing inks, interior coatings, and general-purpose plastic/rubber coloring.
• The pigment has limited weather fastness and migration resistance — not recommended for long-term exterior exposure or soft PVC applications.
• PR4 is coloristically similar to PR2 and PR3 but differs in molecular structure and specific performance characteristics.

Packaging & Storage

• Packaging：25kg/bag，带内衬 PE 层。可按需提供定制包装。
• Storage存放于阴凉、干燥且通风良好的地方，避免阳光直射和热源。防止受潮——不使用时请保持袋口密封。保质期：在适当储存条件下，自生产之日起 24 个月。
• Transportation：不属于联合国运输规章规定的危险品。请小心搬运，避免行李破损。

常见问题（FAQ）

What is Pigment Red 4?

Pigment Red 4 (PR4), also known as Para Red, is a monoazo organic pigment with C.I. number 12085 and CAS number 6410-19-1. It belongs to the β-naphthol azo chemical class and features a yellowish red hue with moderate heat resistance (up to 150°C) and light fastness (Grade 4–5).

Pigment Red 4 与 Pigment Red 5 有何区别？

Both share the same C.I. number (12085) but have different CAS numbers, indicating they are different crystalline or polymorphic forms:

Property	PR4	PR5
CAS 编号	6410-19-1	6410-20-8
客户编号	12085	12085
Heat Resistance	最高150°C	最高150°C
耐光性（全）	Grade 4 – 5	Grade 4 – 5
Primary Use	油墨、涂料、橡胶	Inks, coatings, plastics

PR4 and PR5 have similar performance profiles but may differ in specific dispersion characteristics and hue nuances. Selection depends on your specific formulation requirements.

Is Pigment Red 4 suitable for outdoor applications?

PR4 has limited weather fastness (Grade 2–3 full shade) and is best suited for interior or short-term outdoor applications. For long-term exterior exposure, consider higher-performance alternatives such as Pigment Red 48:2 or Pigment Red 57:1.

Is Pigment Red 4 suitable for high-temperature plastics?

PR4 has heat resistance up to 150°C, which is suitable for most standard plastic processing but not for high-temperature engineering plastics. For applications requiring heat resistance above 200°C, consider benzimidazolone or perylene reds.

是否提供样品、COA 和 SDS？

是的，杭州星赢科技有限公司提供样品供评估，每批货物均附带COA和SDS。

为何选择杭州星文科技有限公司作为您的颜料红 4 供应商？

• 品质一致: Every batch of Starwin Red 4 is tested for color strength, hue, purity, moisture, and physical properties.
• Technical Support: Our team can assist with formulation guidance, dispersion recommendations, and application-specific troubleshooting.
• 可靠供应: Stable production capacity and export experience serving customers across Asia, Europe, and the Americas.
• 竞争性定价: Direct from manufacturer, with flexible MOQ options for trial orders.

Contact Us

杭州星威科技有限公司

For technical data sheets (TDS), safety data sheets (SDS), samples, or pricing inquiries regarding Starwin 红 4（颜料红 4，CAS 6410-19-1），请联系我们的团队。

We welcome both small-scale trial orders and long-term supply partnerships.