riboflavin
Enable an agent to recognise riboflavin, assess the identity and condition of a material containing it, and determine whether that material is suitable for an intended use.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise riboflavin, assess the identity and condition of a material containing it, and determine whether that material is suitable for an intended use.
Riboflavin, or vitamin B2, is a water-soluble organic micronutrient with molecular formula C17H20N4O6 that serves as the precursor of the flavin coenzymes FMN and FAD, which participate in biological oxidation-reduction reactions.
It can be Resolve a riboflavin label or identifier to a verified substance identity.; Compare a lot's assay and impurity results against an intended-use specification.; Calculate riboflavin mass from an assay while preserving the measurement basis.; Assess whether a proposed solvent and concentration require dissolution testing.; Select light-protective handling and request retesting when storage evidence is inadequate.; Determine which documentary and analytical checks remain before accepting material for a stated use..
Distinguishing features
Confirm that the molecular identity is riboflavin itself, rather than a material identified only by a vitamin B2 activity claim.
Distinguish riboflavin from riboflavin phosphate and its salts through molecular identity and a method capable of separating the compounds.
Distinguish riboflavin from FMN and FAD through the presence or absence of phosphate and nucleotide components.
Use validated identity testing to distinguish riboflavin from other yellow or fluorescent substances; colour or fluorescence alone is insufficient.
Distinguish a riboflavin substance lot from a premix or finished product by its declared composition and measured riboflavin fraction.
Scope
+ Molecular identity and verified chemical identifiers for riboflavin
+ Riboflavin content, purity, impurities and grade of a material lot
+ Physical form, solubility and measured properties under specified conditions
+ Light exposure, degradation, storage and analytical evidence of condition
+ Relationships to flavin cofactors and constraints on nutritional, analytical and ingredient uses
- Finished foods, supplements and medicines containing riboflavin
- Flavin mononucleotide, flavin adenine dinucleotide and other derivatives as independently identified substances
- Diagnosis and treatment of riboflavin deficiency or other medical conditions
- Organisms and industrial processes used to manufacture riboflavin
- Complete metabolic pathways and the enzymes that use flavin cofactors
Characteristics
- Chemical identity
- Verified molecular structure, stereochemistry, formula and registry identifiers Prevents substitution of a derivative or vitamin activity label for the identity of riboflavin itself.
- Material grade
- Declared food, pharmaceutical, analytical or other grade; governing specification and edition Suitability depends on documented compliance with a specification, not the grade name alone.
- Riboflavin assay
- % mass fraction or mg/g, with as-received or dry basis and analytical method Establishes actual content for comparison, formulation and acceptance.
- Impurity profile
- Identified impurities and concentrations in mg/kg or %, with detection limits Separates acceptable material from material affected by manufacturing residues or degradation.
- Physical form
- Solid form or dissolved state; particle characteristics and carrier where applicable Affects sampling, dissolution, handling and interpretation of measurements.
- Solubility
- mg/L or g/L, with solvent, pH, temperature and equilibration method Determines whether a proposed preparation can deliver a uniform dissolved concentration.
- Thermal behaviour
- °C, with method and identification of melting, decomposition or another transition Prevents a decomposition event from being treated as a usable melting or boiling point.
- Optical response
- Absorption and fluorescence wavelengths in nm, with solvent, pH and instrument conditions Supports identification and quantification while making method-dependent interference visible.
- Exposure and storage history
- Recorded light protection, temperature, humidity, container and elapsed storage time Supports assessment of whether labelled content still represents the material's condition.
- Cofactor relationship
- Precursor relationship to FMN and FAD, supported by a biological reference Explains biological relevance without equating riboflavin with its downstream cofactors.
- Applicable use and hazard status
- Jurisdiction, intended use, applicable specification, safety classification and evidence date Keeps nutritional identity separate from permission to use a particular material in a particular setting.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 29 questions.
Riboflavin identity Establishes which chemical entity the name riboflavin denotes and separates it from neighbouring flavins and products.
Vitamin terminology and related flavin names can conceal chemically different materials.
Molecular and registry identity
Connects a structural definition to verified identifiers.
Identity evidence
Require an authoritative identity record and compatible material documentation before treating a label as confirmed riboflavin.
- What molecular structure and stereochemistry define riboflavin in the selected authoritative record? definition
- Which verified CAS, PubChem and EC identifiers identify that same entity, and where were they checked? provenance
Related flavin boundaries
Separates riboflavin from derivatives, cofactors and mixtures.
Substance versus vitamin claim
Treat vitamin B2 content claims as evidence requiring interpretation, rather than proof that a material consists of riboflavin.
- Does the supplied material contain riboflavin itself, a phosphate derivative, another flavin or a mixture? boundary
- What analytical or supplier evidence distinguishes riboflavin from FMN, FAD and riboflavin phosphate salts? provenance
Riboflavin lot quality Makes content, purity and grade assessable for an actual material lot.
The substance name alone cannot establish whether a lot is suitable as a nutrient ingredient or analytical reference.
Assay and identity testing
Defines what testing establishes and how results are expressed.
Specific riboflavin measurement
Record an assay that measures riboflavin with sufficient specificity for the material being tested.
- What method measures riboflavin content, and how does it distinguish related flavins or degradation products? measurement
- Is the reported result on an as-received, dry or other basis, and what uncertainty accompanies it? measurement
Grade and impurity acceptance
Relates lot evidence to a named quality specification.
Documented grade compliance
Judge the claimed grade through a specific standard and lot results, including applicable impurity controls.
- Which specification and edition define acceptance for this riboflavin lot? provenance
- Which related substances, residual contaminants and moisture limits must this lot meet before its intended use? action
Riboflavin physical behaviour Captures dissolution, thermal and optical behaviour under stated conditions.
Preparing and measuring riboflavin requires more than a list of unqualified physical constants.
Solid form and dissolution
Relates the supplied form to the feasibility of a proposed preparation.
Achievable dissolved concentration
Record condition-specific solubility and distinguish a solution from a suspension.
- What riboflavin concentration dissolves in the proposed solvent at the stated pH and temperature? measurement
- What observation or test confirms complete dissolution rather than a fine suspension? action
Thermal and optical characterisation
Qualifies physical measurements used for identification and processing decisions.
Interpretable property results
Attach experimental conditions and event interpretation to thermal and optical observations.
- Do reported thermal temperatures describe melting or decomposition, and is a boiling point experimentally meaningful for riboflavin? measurement
- Under which solvent, pH and instrument conditions were the riboflavin absorption or fluorescence results obtained? measurement
Riboflavin stability Connects light exposure and storage conditions to retained identity and content.
Riboflavin condition must be assessed from exposure history and stability evidence, especially for prepared solutions.
Light and environmental exposure
Records conditions that may alter the material during storage or use.
Exposure-dependent integrity
Evaluate light protection and other environmental controls for the actual physical state and preparation.
- What stability evidence applies to riboflavin in this solid or dissolved state under the expected light, pH and temperature conditions? provenance
- What container and handling controls follow from that evidence? action
Degradation and retest
Determines when stored material requires renewed analytical assessment.
Retained content evidence
Use stability-indicating evidence to distinguish retained riboflavin from material that still appears coloured or fluorescent.
- Which degradation products must the selected method separate from riboflavin? measurement
- What exposure excursion, elapsed time or analytical result triggers retesting or rejection? action
Riboflavin use constraints Connects vitamin function and material documentation to permissible, suitable uses.
Biological relevance, chemical suitability and regulatory permission are separate requirements.
Vitamin and cofactor relationships
Records riboflavin's nutritional identity without expanding into clinical management.
Biological role boundary
Represent the precursor relationship to FMN and FAD while keeping clinical claims and derivative identities distinct.
- Which source establishes riboflavin's vitamin B2 identity and its relationship to FMN and FAD? provenance
- Does a proposed claim concern riboflavin content, cofactor formation or a clinical effect requiring a neighbouring model? boundary
Jurisdiction and handling
Determines the documentation and controls required for the intended application.
Use-specific acceptance
Assess applicable ingredient permissions, hazard documentation and workplace controls for the exact material and use.
- Which current jurisdictional rules and purity requirements apply to this use of riboflavin? provenance
- What safety data sheet classification, exposure limits if established, and dust-handling controls apply to this material? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This is a recall-based description; no sources were consulted.
- Grade labels describe quality specifications and intended uses, not distinct molecular varieties; verify the applicable monograph edition and acceptance criteria.
- Verify condition-dependent solubility, decomposition temperature, supplier safety classification and jurisdiction-specific permissions before adding numerical or regulatory claims.
- Which of these check these first hold for the sense of riboflavin this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Food-grade riboflavin
- Pharmaceutical-grade riboflavin
- Feed-grade riboflavin
- Which of these kinds and varieties hold for the sense of riboflavin this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- CAS Registry Number - 83-88-5 - Identifies riboflavin; phosphorylated derivatives and their salts have separate identities.
- PubChem CID - 493570 - Compound identifier for riboflavin.
- EC number - 201-507-1 - European chemical inventory identifier.
- European food additive E number - E 101(i) - Identifies riboflavin as a food colour; this identifier alone does not establish authorization for a particular use.
- Which of these identifiers and schemes hold for the sense of riboflavin this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- United States Pharmacopeia-National Formulary: USP riboflavin monograph specifying pharmaceutical quality.
- European Pharmacopoeia, published by the European Directorate for the Quality of Medicines & HealthCare: riboflavin monograph.
- Food Chemicals Codex, published by USP: riboflavin specification for food ingredient quality.
- Which of these standards and regulation hold for the sense of riboflavin this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Vitamin supplementation and food fortification.
- Vitamin enrichment of animal feeds.
- Yellow colouring of foods.
- Nutrient supplementation in microbial and cell culture media.
- Photosensitizer in corneal collagen cross-linking with ultraviolet A light.
- Which of these real-world use hold for the sense of riboflavin this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Molar mass - 376.36 - g/mol
- Which of these typical measurements hold for the sense of riboflavin this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Light exposure can degrade riboflavin, particularly in solution, reducing potency.
- Illuminated riboflavin can promote photooxidation of other formulation components.
- Limited aqueous solubility can constrain formulation concentration and cause incomplete dissolution.
- Alkaline conditions can accelerate degradation.
- Grade, impurities and microbiological quality determine suitability for food, feed or pharmaceutical use; these grades are not automatically interchangeable.
- Which of these failure modes and hazards hold for the sense of riboflavin this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Food colour identification may use E numbers in Europe and substance names in other jurisdictions.
- Applicable pharmacopoeial specifications and permitted food or feed uses vary by jurisdiction.
- Which of these regional variation hold for the sense of riboflavin this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Flavin mononucleotide (FMN) - FMN is riboflavin 5'-phosphate, a phosphorylated coenzyme derivative rather than unmodified riboflavin.
- Flavin adenine dinucleotide (FAD) - FAD contains an FMN moiety joined to an adenosine monophosphate moiety and is a distinct coenzyme.
- Riboflavin sodium phosphate - This is a sodium salt of phosphorylated riboflavin, with a different chemical identity and formulation properties.
- Riboflavin supplement - A supplement is a formulated product containing riboflavin or a permitted derivative, often with excipients; riboflavin is the substance itself.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of riboflavin this model covers, and on what evidence? provenance
What the second pass must settle
- Which authoritative chemical records resolve the exact riboflavin structure, stereochemistry and identifiers consistently?
- Which current food, pharmaceutical and analytical specifications should govern the grades represented in this model?
- What reliable measurements establish condition-specific solubility and thermal behaviour without confusing decomposition with phase transitions?
- Which stability studies support light-protection measures, solution holding times and degradation-product monitoring for the intended applications?
- Which jurisdiction-specific permissions, hazard classifications and exposure limits, if any, apply to the exact riboflavin material and use?