Pigment Red 8 (Starwin Red 8)

产品概览

Pigment Red 8, also known as Toluidine Red R, is a 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 160°C and light fastness of Grade 4–5, PR8 is widely used in printing inks, coatings, plastics, and rubber products.

Starwin Red 8 is the commercial-grade Pigment Red 8 supplied by Hangzhou Starwin Tech Co., Ltd. It is manufactured to deliver consistent color strength, stable hue, and reliable batch-to-batch reproducibility.

密钥标识

Property	价值
Product Name (EN)	Toluidine Red R
商号	Starwin Red 8
C.I. Name	Pigment Red 8
客户编号	12125
CAS 编号	6407-80-3
EC No.	229-069-4
Molecular Formula	C₁₈H₁₅N₃O₂
分子量	293.33 g/mol
化学类别	Monoazo (β-Naphthol type)
外观	红粉
色度	黄红色

Technical Specifications

以下数据为 Starwin Red 8 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
Purity	≥95.0%
湿度	≤1.5%
pH Value	6.5 – 8.0
吸油	40 – 55 g/100g
密度	1.35 – 1.55 g/cm³
耐热性	最高160°C
Light Fastness (Full Shade)	4 级 – 5
耐光性 (1/3 标准)	3 级 – 4
Weather Fastness (Full Shade)	2 级 – 3
迁移阻力（PVC）	2 级 – 3
耐酸性	4 年级
耐碱性	4 年级
耐溶剂性	好的
关键应用领域	Printing inks, coatings, plastics, rubber
包装	25kg/bag 带内衬 PE
存储	Cool, dry, ventilated area, away from direct sunlight
HS 编码	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 160°C）: Moderate. Slightly better heat stability than PR3/PR4/PR5, suitable for most standard plastic processing temperatures.
• 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 (both Grade 4): Good chemical resistance. Suitable for most standard formulation environments.

关键应用领域

1. Printing Inks (Primary Application)

• 偏移油墨: PR8 provides bright yellowish red coloration in sheet-fed and web offset ink systems for commercial and packaging printing.
• 水性油墨: Used in water-based flexographic and gravure ink formulations.
• Gravure Inks: Suitable for solvent-based gravure printing on various substrates.

2. Coatings

• 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

• 聚氯乙烯: Suitable for rigid PVC applications where migration is less of a concern.
• PE & PP: Can be used in polyolefin coloring at processing temperatures below 160°C.
• 橡胶制品: Used as a colorant in rubber compounding for footwear, gaskets, and industrial rubber goods.

4. Other Applications

• 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 8 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.
• PR8 has slightly better heat resistance (160°C) compared to PR3/PR4/PR5 (150°C), making it marginally more suitable for standard plastic processing.

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。

Frequently Asked Questions (FAQ)

What is Pigment Red 8?

Pigment Red 8 (PR8), also known as Toluidine Red R, is a monoazo organic pigment with C.I. number 12125 and CAS number 6407-80-3. It belongs to the β-naphthol azo chemical class and features a yellowish red hue with moderate heat resistance (up to 160°C) and light fastness (Grade 4–5).

Pigment Red 8 与 Pigment Red 2 有何区别？

Both are monoazo yellowish red pigments with similar performance profiles:

Property	PR8	PR2
CAS 编号	6407-80-3	6410-15-7
客户编号	12125	12310
耐热性	最高160°C	最高160°C
耐光性（全）	4 级 – 5	4 级 – 5
主要用途	油墨、涂料、塑料	Inks, interior coatings, rubber

PR8 and PR2 have very similar performance profiles. PR8 is often preferred for plastic applications while PR2 is more commonly used in rubber and general-purpose inks.

Is Pigment Red 8 suitable for outdoor applications?

PR8 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 8 suitable for high-temperature plastics?

PR8 has heat resistance up to 160°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 8 供应商？

• 品质一致: Every batch of Starwin Red 8 is tested for color strength, hue, purity, moisture, and physical properties.
• Technical Support我们的团队可提供配方指导、分散建议及针对具体应用问题的技术支持。
• 可靠供应：稳定的生产能力与丰富的出口经验，服务亚洲、欧洲及美洲客户。
• 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

关于技术数据表（TDS）、安全数据表（SDS）、样品或价格咨询，Starwin 红 8（颜料红 8，CAS 6407-80-3），请联系我们的团队。

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