Color Developing Agent 3 CD-3 CAS 25646-71-3
Free Sample Color Developing Agent 3 CD-3 CAS 25646-71-3
- Appearance:Powder
- Purity:99.8%
- Delivery:30days
- Sample Available:Available
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Name: Color Developing Agent 3 CD-3
CAS: 25646-71-3
MOQ: 1KG
Directory Guidance on Color Developing Agent 3 CD-3
Chemical Structure
Basic Info:
| density | 1.5[at 20℃] |
| vapor pressure | 0.022Pa at 20℃ |
| storage temp. | Keep in dark place,Sealed in dry,Room Temperature |
| Water Solubility | 1000g/L at 20℃ |
Product Introduction:
Color Developing Agent 3 CD-3 is an organic compound based on a p-phenylenediamine derivative with the chemical name n-ethyl-N -(2-methanesulfonamide ethyl) -2-methyl-1, 4-phenylenediamine sesquisulfate monohydrate with CAS number 24567-76-8. From the perspective of molecular structure, the core structure of Color Developing Agent 3 CD-3 contains amino group, sulfonamide group and benzene ring, and these functional groups give its development activity. Molecular formula is C12H21N3O2S·1.5H2SO4·H2O, molecular weight is about 873.01, usually white or light yellow crystalline powder at room temperature, easy to dissolve in water and some organic solvents, good solubility and high stability.
In the development process of color photography, the central role of Color Developing Agent 3 CD-3 is to convert silver halide (such as AgBr) in the photographic layer of the film into metallic silver particles through a reduction reaction, while itself is oxidized. This process involves complex chemical kinetic equilibrium, and the pH value of the developing solution needs to be strictly controlled within the range of 10.25 ± 0.05 to ensure the efficiency of development and the accuracy of dye generation.
The development mechanism of Color Developing Agent 3 CD-3 is different from other developers (such as CD-4 in the C-41 process), mainly reflected in its specificity to the dye coupling reaction and the light resistance of the dye after development. The sulfonamide group in its molecule can not only enhance the water solubility of the developer, but also adjust the development rate to avoid the color distortion caused by excessive development. In addition, Color Developing Agent 3 CD-3 can still maintain high activity under high temperature development environment, which makes it a significant advantage in industrial continuous washing process.
Although Color Developing Agent 3 CD-3 occupies an important position in the field of development, its production and use still need to follow strict safety regulations. For example, its oxidation products may be potentially toxic to aquatic organisms, so it is necessary to reduce environmental risks in wastewater treatment by chelation precipitation or photochemical degradation. In addition, CD-3 storage conditions require protection from light, dryness, and isolation from strong oxidants to prevent decomposition or unexpected reactions.
Nature and Specifications:
| Item | Specification |
| Product Name | Color Developing Agent 3 CD-3 |
| CAS No. | 25646-71-3 |
| Appearance | Powder |
| Shelf Life | 2 years |
| Packing | As your requirements |
| Product Name: | 2-[(4-Amino-3-methylphenyl)ethylamino]ethyl sulfate |
| Synonyms: | CD-3 |
| CAS: | 25646-71-3 |
| MF: | C12H23N3O6S2 |
| MW: | 369.45 |
| EINECS: | 247-161-5 |
Product service:
- Certificate Of Analysis (COA)
- Material Safety Data Sheet (MSDS)
- Route of synthesis (ROS)
- Method of Aanlysis (MOA)
- Nuclear Magnetic Resonance (NMR)
- Packing pictures and loading video before loading
- Free Sample
- Factory audit
Color Developing Agent 3 CD-3 was originally designed for use in the development process of motion picture film and color paper, especially in the ECN-2 development process for film reels such as the Kodak Vision series and Fujifilm Eterna (discontinued). In the traditional film industry, CD-3 works in concert with a specific formulation of developer (including sodium sulfite, carbonate buffer system, etc.) to precisely control development time and temperature, ensuring a linear response to color reproduction. For example, in the standard formulation of ECN-2 developer, the concentration of Color Developing Agent 3 CD-3 is usually 4 g/l, and the ionic strength is adjusted in combination with sodium bromide and sodium bicarbonate to suppress fog and improve image contrast.
With the popularity of digital imaging technology, the application scenario of Color Developing Agent 3 CD-3 has gradually shifted to the field of professional photography and printing. In high-end color printing, CD-3 is used for the development of high-precision color separators, and the dyes after development have excellent color gamut coverage and weather resistance, which can meet the needs of long-term archiving. In addition, some industrial inspection systems (such as X-ray film analysis) also use Color Developing Agent 3 CD-3 as a developer, using its high sensitivity to capture weak signals.
In recent years, the process improvement of Color Developing Agent 3 CD-3 has focused on environmental protection and cost optimization. For example, the difficulty of wastewater treatment can be reduced by simplifying the formulation (e.g., omitting the anti-fogging agent AF-2000) or by using alternative chelators (e.g. DTPA). At the same time, the large-scale production of the supply chain has significantly reduced the cost of CD-3, and a number of chemical enterprises in Hubei, China (such as Shishun Biology, Yongkuo Technology) have achieved the bulk supply of 99% purity Color Developing Agent 3 CD-3, the price range is 25-66 yuan/kg, and the supply capacity is up to 1,000 tons per year.
It is worth noting that CD-3 is still irreplaceable in the digital intermediate film (DI) process. Although digital scanning technology has made it possible to obtain film information directly, some directors and photographers still prefer to preserve the unique texture of film through ECN-2 development, and Color Developing Agent 3 CD-3 has maintained steady demand in this niche market. In the future, with the revival of retro photography culture, CD-3 may usher in a new round of technological iterations, such as the development of low-temperature development formulations or derivatives compatible with new environmentally friendly couplings.
The core competitiveness of Color Developing Agent 3 CD-3 stems from its chemical properties and maturity of industrial production. First of all, its development efficiency is significantly higher than that of earlier developers (such as CD-2), and higher density silver salt reduction can be achieved per unit dosage, thus reducing developer consumption. Secondly, the reaction selectivity of Color Developing Agent 3 CD-3 with dye coupler is excellent, and the color deviation after development can be controlled at ΔE<1.5 (CIE Lab standard), meeting the strict requirements of professional images.
From the production side, the synthesis process of Color Developing Agent 3 CD-3 has been optimized for decades, and the modular reactor and continuous crystallization technology have been adopted to shorten the production cycle to 72 hours, and the product purity is stable at more than 99%, and the heavy metal residue is less than 10ppm. This efficient capacity supports the global supply of CD-3, especially in Southeast Asia and Europe, where it has a high share of the market.
The standardization of packaging and logistics has further improved the market adaptability of Color Developing Agent 3 CD-3. Mainstream suppliers provide 25 kg drums, 1 kg small packaging and customized sub-packaging services, taking into account the needs of industrial customers and laboratory users. In addition, the long-term storage stability of CD-3 (shelf life ≥2 years) reduces the risk of supply chain disruption and is particularly suitable for remote areas or emergency stockpiles.
Environmental compliance is also an important selling point for Color Developing Agent 3 CD-3. Compared with developers containing heavy metals, the metabolites of CD-3 can be degraded by conventional biochemical treatment, and some companies also provide wastewater pretreatment solutions (such as adsorption-oxidation technology) to help users meet discharge standards and achieve closed-loop management from raw material procurement to waste recycling.
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Related References:
chemicalbook-Color Developing Agent 3 CD-3
Color Developing Agent 3 CD-3 Manufacturer
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