# isinglass

> substance obtained from the dried swim bladders of fish

**Wikidata**: [Q1255331](https://www.wikidata.org/wiki/Q1255331)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Isinglass)  
**Source**: https://4ort.xyz/entity/isinglass

## Summary  
Isinglass is a substance derived from the dried swim bladders of fish, primarily used as a food ingredient, adhesive, and clarifying agent in beverages like beer. It belongs to the class of gelatin and is classified as an animal glue, distinguished by its unique source and historical applications.  

## Key Facts  
- **Source**: Obtained from the swim bladders of fish, particularly species like *Huso* (a type of sturgeon).  
- **Classifications**: Subclass of animal glue and gelatin; instance of food ingredient, adhesive, and body part.  
- **Aliases**: Known as fish glue, colapez, ictiocola, and Hausenblasenleimlösung, among others.  
- **CAS Registry Number**: 91053-28-0.  
- **Materials Used**: Production involves swim bladders, fish bones, shagreen, water, and distilled vinegar (0.1% concentration).  
- **Cultural Documentation**: Featured in historical encyclopedias like *Nordisk familjebok* and the 1911 *Encyclopædia Britannica*.  
- **Multilingual Coverage**: Wikipedia entries in 10 languages, including English, Spanish, and German.  

## FAQs  
### Q: What is isinglass used for?  
A: Isinglass is used as a fining agent in beer production to clarify beverages, as a food ingredient, and historically as an adhesive.  

### Q: Is isinglass related to gelatin?  
A: Yes, isinglass is a subclass of gelatin, though it is specifically derived from fish swim bladders rather than animal connective tissues.  

### Q: Is isinglass vegan?  
A: No, isinglass is not vegan because it is sourced from fish, making it an animal-derived product.  

## Why It Matters  
Isinglass holds historical and industrial significance as a versatile substance bridging food science and materials engineering. Its unique properties as a collagen-rich material made it essential in traditional beer clarification, where it removes impurities without altering flavor. As a natural adhesive, it predates synthetic alternatives, offering non-toxic bonding solutions. While modern industrial processes have reduced its prevalence, isinglass remains a notable example of early biomaterial utilization, highlighting the intersection of natural resources and human innovation. Its study provides insights into historical manufacturing techniques and the evolution of food and adhesive technologies.  

## Notable For  
- **Traditional Brewing**: Historically critical for clarifying beer, particularly in British brewing traditions.  
- **Natural Adhesive**: Served as a non-synthetic glue in bookbinding, woodworking, and art conservation.  
- **Multilingual Heritage**: Documented across diverse cultures, reflected in over 20 language-specific terms and Wikipedia entries.  
- **Specialized Source**: Primarily derived from sturgeon swim bladders, emphasizing its unique biological origin.  

## Body  
### Composition and Sources  
Isinglass is produced from the swim bladders of fish, notably the *Huso* species. These bladders are rich in collagen, which forms a gelatinous substance when processed. The material undergoes drying and treatment with water and diluted vinegar (0.1% concentration) to create a usable product.  

### Uses  
- **Food and Beverage**:  
  - **Beer Fining**: Acts as a clarifying agent by binding to yeast and proteins, enhancing beer stability and appearance.  
  - **Culinary Ingredient**: Historically used as a gelling agent in desserts, though largely replaced by gelatin.  
- **Adhesives**:  
  - Employed in traditional crafts for bonding materials like paper, wood, and leather due to its low melting point and flexibility.  

### Properties and Classification  
- **Chemical Identity**: CAS number 91053-28-0, classifying it as a collagen-based polymer.  
- **Hierarchical Relations**:  
  - Subclass of **animal glue** and **gelatin**, sharing peptide and protein structures.  
  - Distinguished from mammal-derived gelatin by its ichthyic (fish-based) origin.  

### Historical and Cultural Context  
- **Documentation**: Featured in the 1911 *Encyclopædia Britannica* and Nordic encyclopedias, reflecting its historical importance.  
- **Terminology**: Known by over 20 aliases (e.g., *colle de poisson*, *ichtyocolle*), underscoring its global use.  

### Modern Considerations  
- **Vegan Alternatives**: Increasingly replaced by plant-based clarifying agents (e.g., pea protein) in food and beverage industries.  
- **Industrial Niche**: Maintains relevance in specialized applications, such as artisanal brewing and conservation-restoration work.

## References

1. Q34654469
2. Freebase Data Dumps. 2013