{
  "meta": {
    "disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
    "terms": "https://open.fda.gov/terms/",
    "license": "https://open.fda.gov/license/",
    "last_updated": "2025-09-19",
    "results": {
      "skip": 0,
      "limit": 1,
      "total": 1
    }
  },
  "results": [
    {
      "polymer": {
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        "classification": {
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            "references": [],
            "unii": "23R93M6Y64",
            "linking_id": "23R93M6Y64",
            "ref_pname": "CHITOSAN OLIGOSACCHARIDE",
            "substance_class": "reference"
          },
          "polymer_class": "HOMOPOLYMER",
          "polymer_geometry": "GRAFT",
          "polymer_subclass": [
            "SUBSTITUTED"
          ],
          "source_type": "BIOSYNTHETIC"
        },
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            "type": "MONOMER",
            "defining": false,
            "monomer_substance": {
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              "refuuid": "fa076cc4-0e8d-4b65-aef5-cf1e95e2659e",
              "name": "PROPYLENE OXIDE",
              "linking_id": "Y4Y7NYD4BK",
              "ref_pname": "PROPYLENE OXIDE",
              "substance_class": "reference",
              "unii": "Y4Y7NYD4BK"
            }
          }
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          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "MIXED",
          "defined_stereo": 4,
          "ez_centers": 0,
          "molecular_weight": 351.3933,
          "optical_activity": "UNSPECIFIED",
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        "idealized_structure": {
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*   0  0  0  0  0  0  0  0  0  0  0  0\n   26.9220   -8.1891    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   28.0896   -7.1547    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0\n   26.1783   -9.5604    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   26.9943  -10.8901    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n   24.6190   -9.6023    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   23.8753  -10.9736    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   24.6913  -12.3034    0.0000 *   0  0  0  0  0  0  0  0  0  0  0  0\n   23.8030   -8.2725    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   22.6354   -9.3070    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0\n   22.5816   -7.3021    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   21.1304   -7.8748    0.0000 *   0  0  0  0  0  0  0  0  0  0  0  0\n   24.5467   -6.9011    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   23.7308   -5.5716    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   22.1712   -5.6132    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   21.3554   -4.2837    0.0000 *   0  0  0  0  0  0  0  0  0  0  0  0\n   26.1061   -6.8595    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   28.5536  -10.8484    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   29.0742   -9.8884    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   29.3696  -12.1780    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  1  0  0  0  0\n  1  3  1  0  0  0  0\n  3  4  1  0  0  0  0\n  4  5  1  0  0  0  0\n  1  6  1  0  0  0  0\n  8  7  1  0  0  0  0\n  9  8  1  0  0  0  0\n  9 10  1  0  0  0  0\n 10 11  1  1  0  0  0\n 12 11  1  0  0  0  0\n 13 10  1  0  0  0  0\n 13 14  1  0  0  0  0\n 13 15  1  0  0  0  0\n 15 16  1  1  0  0  0\n 15 17  1  0  0  0  0\n 17 18  1  6  0  0  0\n  8 17  1  0  0  0  0\n 18 19  1  0  0  0  0\n 16 20  1  0  0  0  0\n 12 21  1  0  0  0  0\n 14 22  1  0  0  0  0\n  8 23  1  6  0  0  0\n 13 24  1  1  0  0  0\n 25 26  1  0  0  0  0\n 28 27  1  0  0  0  0\n 28 29  1  6  0  0  0\n 28 30  1  0  0  0  0\n 30 31  1  6  0  0  0\n 32 30  1  0  0  0  0\n 32 33  1  1  0  0  0\n 33 34  1  0  0  0  0\n 35 32  1  0  0  0  0\n 35 36  1  1  0  0  0\n 35 37  1  0  0  0  0\n 37 38  1  0  0  0  0\n 35 39  1  0  0  0  0\n 39 40  1  1  0  0  0\n 41 40  1  0  0  0  0\n 41 42  1  0  0  0  0\n 43 39  1  0  0  0  0\n 43 28  1  0  0  0  0\n 31 44  1  0  0  0  0\n 44 45  1  0  0  0  0\n 44 46  2  0  0  0  0\nM  STY  1   1 SRU\nM  SCN  1   1 HT \nM  SAL   1  4   1   2   3   4\nM  SBL   1  2   4   5\nM  SMT   1 C\nM  SDI   1  4   35.1714   -8.5751   35.1714   -6.8539\nM  SDI   1  4   39.2209   -6.8539   39.2209   -8.5751\nM  STY  1   2 SRU\nM  SCN  1   2 HT \nM  SAL   2  8  13  10   9   8  17  15  16  20\nM  SAL   2  8  18  19  23  11  12  21  14  24\nM  SBL   2  2   6  21\nM  SMT   2 A\nM  SDI   2  4    9.9299   -8.1655    9.9299   -5.6044\nM  SDI   2  4   15.9570   -5.6044   15.9570   -8.1655\nM  STY  1   3 SRU\nM  SCN  1   3 HT \nM  SAL   3  8  35  39  43  28  30  32  33  34\nM  SAL   3  8  31  44  46  45  29  40  41  42\nM  SAL   3  2  37  36\nM  SBL   3  2  25  35\nM  SMT   3 B\nM  SDI   3  4   21.8561   -9.5112   21.8561   -6.7994\nM  SDI   3  4   27.9152   -6.7994   27.9152   -9.5112\nM  END",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "MIXED",
          "references": [],
          "defined_stereo": 4,
          "ez_centers": 0,
          "molecular_weight": 419.4044,
          "optical_activity": "UNSPECIFIED",
          "stereo_centers": 11
        }
      },
      "codes": [
        {
          "uuid": "ccd139ea-694e-4b8b-9f76-fa422bf7b11a",
          "code": "84069-44-3",
          "type": "NO STRUCTURE GIVEN",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=84069-44-3",
          "code_system": "CAS",
          "references": [
            "717db344-1a41-4164-bb1a-b4245270474a"
          ]
        },
        {
          "uuid": "c2824537-c274-4ccb-9281-4330c83c637b",
          "code": "U29X8K6F6L",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        }
      ],
      "substance_class": "polymer",
      "notes": [
        {
          "note": "This is an incomplete polymer record. A more detailed definition may be available soon.",
          "references": [],
          "uuid": null
        }
      ],
      "references": [
        {
          "uuid": "6b86dde8-0b2e-4d85-9cb1-6785f3eb266e",
          "citation": "Peng, Yanfei, et al. \"Preparation and antimicrobial activity of hydroxypropyl chitosan.\" Carbohydrate Research 340.11 (2005): 1846-1851.",
          "url": "https://doi.org/10.1016/j.carres.2005.05.009",
          "doc_type": "JA",
          "public_domain": true,
          "tags": [
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "387fd6d5-6e69-4d0a-9377-8d269592150f",
          "citation": "Shao, K., Han, B., Dong, W. et al. Pharmacokinetics and biodegradation performance of a hydroxypropyl chitosan derivative. J. Ocean Univ. China 14, 888–896 (2015). https://doi-org.fda.idm.oclc.org/10.1007/s11802-015-2600-6",
          "url": "https://link-springer-com.fda.idm.oclc.org/article/10.1007/s11802-015-2600-6#citeas",
          "doc_type": "JA",
          "public_domain": true,
          "tags": [
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "36203bbe-349f-4610-942e-bfcdb233389b",
          "citation": "WHO-DD",
          "doc_type": "WHO DRUG DICTIONARY",
          "public_domain": true,
          "tags": [
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "717db344-1a41-4164-bb1a-b4245270474a",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "09fdabfa-544d-7254-5889-31bfaba72946",
          "citation": "PCPC",
          "doc_type": "PERSONAL CARE PRODUCTS COUNCIL",
          "public_domain": true
        },
        {
          "uuid": "eee46534-23ee-5b53-cb2c-7ca1a27363f7",
          "citation": "STARI",
          "doc_type": "CFSAN",
          "public_domain": true
        },
        {
          "uuid": "eb7fcb89-f441-48ef-bfae-35fa59837ea6",
          "citation": "FDA_SRS",
          "doc_type": "FDA_SRS",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "definition_level": "INCOMPLETE",
      "uuid": "c7e86b06-ba07-4a0f-bcb9-1f8e8ee4b4d8",
      "version": "18",
      "unii": "U29X8K6F6L",
      "names": [
        {
          "uuid": "95e36109-da4c-4dc8-95f8-d70a48345854",
          "name": "AEC Hydroxypropyl Chitosan",
          "stdName": "AEC HYDROXYPROPYL CHITOSAN",
          "type": "bn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "09fdabfa-544d-7254-5889-31bfaba72946"
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          "display_name": false
        },
        {
          "uuid": "74beef87-fb19-4f45-ae33-863456311876",
          "name": "HYDROXYPROPYL CHITOSAN [WHO-DD]",
          "stdName": "HYDROXYPROPYL CHITOSAN [WHO-DD]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
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          ],
          "display_name": false
        },
        {
          "uuid": "df88ab86-ee74-4c13-849c-6a1da31f2739",
          "name": "Hydroxypropyl Chitosan",
          "stdName": "HYDROXYPROPYL CHITOSAN",
          "type": "of",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
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          "display_name": true,
          "domains": [
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          ]
        }
      ],
      "properties": [
        {
          "uuid": "03e069cb-9dfd-4bce-88cd-330e5f45264d",
          "name": "MOL_WEIGHT:NUMBER AVERAGE",
          "value": {
            "uuid": "b52ce306-6a0c-42ea-bafb-dcdf10f11853",
            "high": 92000,
            "low": 21000
          },
          "defining": false,
          "property_type": "BIOLOGICAL"
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      "modifications": {
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}