Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Basic Information
Product Name: 2-Anilino-6-dibutylamino-3-methylfluoran
CAS Number: 89331-94-2
Alias: Black color developing agent ODB-2, ODB2
Chemical Full Name: 2-anilino-6-(dibutylamino)-3-methylspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one
Molecular Formula: C35H38N2O3
Molecular Weight: 534.69
EINECS: Not available
Structural Information
- Structure Type: Fluoran leuco dye (pressure-sensitive thermal black color former)
- Structural Features: Spiro fluoran ring system; contains dibutylamino group, anilino group and methyl substituent; colorless spiro closed-loop structure under normal state, ring-opening to form black conjugated chromophore under heating/acid catalysis
- Characteristic: High black color density, low background fog, good thermal stability, main black color developer for thermal paper
Physical & Chemical Properties
- Appearance: White to off-white fine crystalline powder
- Odor: Odorless
- Melting Point: 182–186 °C
- Solubility: Insoluble in water; soluble in dichloromethane, chloroform, toluene, ethyl acetate; slightly soluble in ethanol, methanol
- Stability: Stable under dark sealed room temperature storage; resistant to weak alkali; reacts with acidic developer to develop black color; discolored under strong ultraviolet irradiation; compatible with most thermal sensitizers
Synthesis & Applications
Production Method
Condensation of 2-(4-dibutylamino-2-hydroxybenzoyl)benzoic acid with 3-methyl-4-methoxydiphenylamine under acidic catalysis, followed by recrystallization purification.
Main Applications
- Thermal paper color former: Core black leuco dye for receipt thermal paper, label thermal paper, medical thermal film
- Pressure-sensitive recording paper: Black color developing component for carbonless copy paper microcapsule system
- Heat-sensitive indicator material: Temperature sensing color-changing raw material for industrial temperature labels
- Security printing auxiliary: Discoloration anti-counterfeiting raw material for special confidential documents
Safety & Storage Instructions
GHS Hazard Classification
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation from dust inhalation
Personal Protection
Dust mask, chemical splash goggles, nitrile gloves; all operations in ventilated workshop, avoid long-term dust contact with skin and respiratory tract.
Storage Condition
Hermetically sealed light-proof plastic-lined paper drum, cool dry warehouse ≤25℃; isolate acidic substances, oxidants, avoid direct sunlight.
Transportation
General fine chemical solid powder; prevent bag breakage and dust leakage during transit, keep away from acid goods.
Quality Specifications
- Purity (HPLC): ≥99.0%
- Loss on Drying: ≤0.3%
- Residue on Ignition: ≤0.1%
- Color developing performance: Deep black, no background color
Information Summary Table
| Item | Specification |
| CAS Number | 89331-94-2 |
| Product Name | 2-Anilino-6-dibutylamino-3-methylfluoran |
| Synonym | ODB-2, Thermal black color former ODB2 |
| Molecular Formula | C35H38N2O3 |
| Molecular Weight | 534.69 |
| Appearance | White crystalline powder |
| Melting Point | 182–186℃ |
| Core Advantage | High black color density, low fog, stable thermal performance |
| Storage Rule | Sealed light-proof cool dry storage, separate from acidic materials |
| Hazard Property | Dust mild irritant to skin, eyes and respiratory tract, low acute toxicity |
| Main Usage | Thermal paper black color developer, carbonless copy paper leuco dye, temperature sensing anti-counterfeiting material |
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